diff --git a/lib/AppInfo/Application.php b/lib/AppInfo/Application.php
index 73785c6..c5c9309 100644
--- a/lib/AppInfo/Application.php
+++ b/lib/AppInfo/Application.php
@@ -26,8 +26,7 @@ namespace OCA\Registration\AppInfo;
 use OCP\AppFramework\App;
 
 class Application extends App {
-
-	public function __construct(array $urlParams = array()) {
+	public function __construct(array $urlParams = []) {
 		parent::__construct('registration', $urlParams);
 
 		$container = $this->getContainer();
@@ -39,5 +38,4 @@ class Application extends App {
 			$container->registerCapability(\OCA\Registration\Capabilities::class);
 		}
 	}
-
 }
diff --git a/lib/Capabilities.php b/lib/Capabilities.php
index 8234245..2403247 100644
--- a/lib/Capabilities.php
+++ b/lib/Capabilities.php
@@ -23,7 +23,6 @@
 
 namespace OCA\Registration;
 
-use OCP\Capabilities\ICapability;
 use OCP\Capabilities\IPublicCapability;
 use OCP\IURLGenerator;
 
@@ -47,5 +46,4 @@ class Capabilities implements IPublicCapability {
 			]
 		];
 	}
-
 }
diff --git a/lib/Controller/ApiController.php b/lib/Controller/ApiController.php
index c11732d..c7847e9 100644
--- a/lib/Controller/ApiController.php
+++ b/lib/Controller/ApiController.php
@@ -47,9 +47,9 @@ class ApiController extends OCSController {
 	/** @var Defaults */
 	private $defaults;
 
-	const REGISTRATION_STATUS_COMPLETE = 0;
-	const REGISTRATION_STATUS_PENDING = 1;
-	const REGISTRATION_STATUS_EXISTING = 2;
+	public const REGISTRATION_STATUS_COMPLETE = 0;
+	public const REGISTRATION_STATUS_PENDING = 1;
+	public const REGISTRATION_STATUS_EXISTING = 2;
 
 	public function __construct($appName,
 								IRequest $request,
@@ -80,7 +80,7 @@ class ApiController extends OCSController {
 			$this->registrationService->validateDisplayname($displayname);
 			$this->registrationService->validateUsername($username);
 		} catch (RegistrationException $e) {
-            throw CoreBridge::createException('OCSBadRequestException', $e->getMessage());
+			throw CoreBridge::createException('OCSBadRequestException', $e->getMessage());
 		}
 		$data = [
 			'username' => $username,
@@ -103,7 +103,7 @@ class ApiController extends OCSController {
 			/** @var Registration $registration */
 			$registration = $this->registrationService->getRegistrationForSecret($clientSecret);
 		} catch (DoesNotExistException $e) {
-            throw CoreBridge::createException('OCSNotFoundException', 'No pending registration.');
+			throw CoreBridge::createException('OCSNotFoundException', 'No pending registration.');
 		}
 
 		if (!$registration->getEmailConfirmed()) {
@@ -148,7 +148,7 @@ class ApiController extends OCSController {
 		try {
 			$secret = null;
 			$registration = $this->registrationService->validateEmail($email);
-			if($registration === true) {
+			if ($registration === true) {
 				$this->registrationService->validateDisplayname($displayname);
 				$this->registrationService->validateUsername($username);
 				$registration = $this->registrationService->createRegistration($email, $username, $password, $displayname);
@@ -168,12 +168,12 @@ class ApiController extends OCSController {
 
 			$data['message'] = $this->l10n->t('Your registration is pending. Please confirm your email address.');
 			$data['registrationStatus'] = self::REGISTRATION_STATUS_PENDING;
-			if($secret !== null) {
+			if ($secret !== null) {
 				$data['secret'] = $secret;
 			}
 			return new DataResponse($data, Http::STATUS_OK);
 		} catch (RegistrationException $exception) {
-            throw CoreBridge::createException('OCSException', $exception->getMessage(), $exception->getCode());
+			throw CoreBridge::createException('OCSException', $exception->getMessage(), $exception->getCode());
 		}
 	}
 }
diff --git a/lib/Controller/RegisterController.php b/lib/Controller/RegisterController.php
index a401325..dfe82bb 100644
--- a/lib/Controller/RegisterController.php
+++ b/lib/Controller/RegisterController.php
@@ -42,7 +42,7 @@ class RegisterController extends Controller {
 		IURLGenerator $urlgenerator,
 		RegistrationService $registrationService,
 		MailService $mailService
-	){
+	) {
 		parent::__construct($appName, $request);
 		$this->l10n = $l10n;
 		$this->urlgenerator = $urlgenerator;
@@ -59,10 +59,10 @@ class RegisterController extends Controller {
 	 * @return TemplateResponse
 	 */
 	public function askEmail($errormsg, $entered) {
-		$params = array(
+		$params = [
 			'errormsg' => $errormsg ? $errormsg : $this->request->getParam('errormsg'),
 			'entered' => $entered ? $entered : $this->request->getParam('entered')
-		);
+		];
 		return new TemplateResponse('registration', 'register', $params, 'guest');
 	}
 
@@ -82,26 +82,26 @@ class RegisterController extends Controller {
 		}
 		try {
 			$reg = $this->registrationService->validateEmail($email);
-			if ( $reg === true ) {
+			if ($reg === true) {
 				$registration = $this->registrationService->createRegistration($email);
 				$this->mailService->sendTokenByMail($registration);
 			} else {
 				$this->registrationService->generateNewToken($reg);
 				$this->mailService->sendTokenByMail($reg);
-				return new TemplateResponse('registration', 'message', array('msg' =>
+				return new TemplateResponse('registration', 'message', ['msg' =>
 					$this->l10n->t('There is already a pending registration with this email, a new verification email has been sent to the address.')
-				), 'guest');
+				], 'guest');
 			}
 		} catch (RegistrationException $e) {
-			return new TemplateResponse('registration', 'message', array('msg' =>
+			return new TemplateResponse('registration', 'message', ['msg' =>
 				$e->getMessage().'<br/>'.$e->getHint()
-			), 'guest');
+			], 'guest');
 		}
 
 
-		return new TemplateResponse('registration', 'message', array('msg' =>
+		return new TemplateResponse('registration', 'message', ['msg' =>
 			$this->l10n->t('Verification email successfully sent.')
-		), 'guest');
+		], 'guest');
 	}
 
 	/**
@@ -130,7 +130,6 @@ class RegisterController extends Controller {
 		} catch (RegistrationException $exception) {
 			return $this->renderError($exception->getMessage(), $exception->getHint());
 		}
-
 	}
 
 	/**
@@ -152,8 +151,8 @@ class RegisterController extends Controller {
 			return new TemplateResponse('registration', 'form',
 				[
 					'email' => $registration->getEmail(),
-					'entered_data' => array('user' => $username),
-					'errormsgs' => array($exception->getMessage()),
+					'entered_data' => ['user' => $username],
+					'errormsgs' => [$exception->getMessage()],
 					'token' => $token
 				], 'guest');
 		}
@@ -166,18 +165,17 @@ class RegisterController extends Controller {
 			return new TemplateResponse(
 				'registration',
 				'message',
-				array('msg' => $this->l10n->t("Your account has been successfully created, but it still needs approval from an administrator.")),
+				['msg' => $this->l10n->t("Your account has been successfully created, but it still needs approval from an administrator.")],
 				'guest');
 		}
 	}
 
 	private function renderError($error, $hint="") {
-		return new TemplateResponse('', 'error', array(
-			'errors' => array(array(
+		return new TemplateResponse('', 'error', [
+			'errors' => [[
 				'error' => $error,
 				'hint' => $hint
-			))
-		), 'error');
+			]]
+		], 'error');
 	}
-
 }
diff --git a/lib/Controller/SettingsController.php b/lib/Controller/SettingsController.php
index 0252317..a487cf5 100644
--- a/lib/Controller/SettingsController.php
+++ b/lib/Controller/SettingsController.php
@@ -32,7 +32,7 @@ class SettingsController extends Controller {
 	/** @var string */
 	protected $appName;
 
-	public function __construct($appName, IRequest $request, IL10N $l10n, IConfig $config, IGroupManager $groupmanager){
+	public function __construct($appName, IRequest $request, IL10N $l10n, IConfig $config, IGroupManager $groupmanager) {
 		parent::__construct($appName, $request);
 		$this->l10n = $l10n;
 		$this->config = $config;
@@ -47,14 +47,14 @@ class SettingsController extends Controller {
 	 *
 	 * @param string $registered_user_group all newly registered user will be put in this group
 	 * @param string $allowed_domains Registrations are only allowed for E-Mailadresses with these domains
-     * @param bool $admin_approval_required newly registered users have to be validated by an admin
+	 * @param bool $admin_approval_required newly registered users have to be validated by an admin
 	 * @return DataResponse
 	 */
 	public function admin($registered_user_group, $allowed_domains, $admin_approval_required) {
 		// handle domains
-		if ( ( $allowed_domains==='' ) || ( $allowed_domains === NULL ) ){
+		if (($allowed_domains==='') || ($allowed_domains === null)) {
 			$this->config->deleteAppValue($this->appName, 'allowed_domains');
-		}else{
+		} else {
 			$this->config->setAppValue($this->appName, 'allowed_domains', $allowed_domains);
 		}
 
@@ -63,34 +63,34 @@ class SettingsController extends Controller {
 
 		// handle groups
 		$groups = $this->groupmanager->search('');
-		$group_id_list = array();
-		foreach ( $groups as $group ) {
+		$group_id_list = [];
+		foreach ($groups as $group) {
 			$group_id_list[] = $group->getGid();
 		}
-		if ( $registered_user_group === 'none' ) {
+		if ($registered_user_group === 'none') {
 			$this->config->deleteAppValue($this->appName, 'registered_user_group');
-			return new DataResponse(array(
-				'data' => array(
+			return new DataResponse([
+				'data' => [
 					'message' => (string) $this->l10n->t('Saved'),
-				),
+				],
 				'status' => 'success'
 				
-			));
-		} else if ( in_array($registered_user_group, $group_id_list) ) {
+			]);
+		} elseif (in_array($registered_user_group, $group_id_list)) {
 			$this->config->setAppValue($this->appName, 'registered_user_group', $registered_user_group);
-			return new DataResponse(array(
-				'data' => array(
+			return new DataResponse([
+				'data' => [
 					'message' => (string) $this->l10n->t('Saved'),
-				),
+				],
 				'status' => 'success'
-			));
+			]);
 		} else {
-			return new DataResponse(array(
-				'data' => array(
+			return new DataResponse([
+				'data' => [
 					'message' => (string) $this->l10n->t('No such group'),
-				),
+				],
 				'status' => 'error'
-			), Http::STATUS_NOT_FOUND);
+			], Http::STATUS_NOT_FOUND);
 		}
 	}
 	/**
@@ -102,7 +102,7 @@ class SettingsController extends Controller {
 		// handle groups
 		$groups = $this->groupmanager->search('');
 		$group_id_list = [];
-		foreach ( $groups as $group ) {
+		foreach ($groups as $group) {
 			$group_id_list[] = $group->getGid();
 		}
 		$current_value = $this->config->getAppValue($this->appName, 'registered_user_group', 'none');
diff --git a/lib/Db/Registration.php b/lib/Db/Registration.php
index 9d8473f..f9899b4 100644
--- a/lib/Db/Registration.php
+++ b/lib/Db/Registration.php
@@ -26,7 +26,6 @@ namespace OCA\Registration\Db;
 use OCP\AppFramework\Db\Entity;
 
 class Registration extends Entity {
-
 	public $id;
 	protected $email;
 	protected $username;
@@ -40,5 +39,4 @@ class Registration extends Entity {
 	public function __construct() {
 		$this->addType('emailConfirmed', 'boolean');
 	}
-
-}
\ No newline at end of file
+}
diff --git a/lib/Db/RegistrationMapper.php b/lib/Db/RegistrationMapper.php
index 80b6308..6f8fcb9 100644
--- a/lib/Db/RegistrationMapper.php
+++ b/lib/Db/RegistrationMapper.php
@@ -97,5 +97,4 @@ class RegistrationMapper extends Mapper {
 		//FIXME eqivalent to ISecureRandom::CHAR_HUMAN_READABLE introduced in https://github.com/nextcloud/server/commit/f2a2b34e4639e88f8d948a388a51f010212b42a3 but not supported in ownCloud yet. We'll just use the string for now then switch to constants when supported.
 		$registration->setClientSecret($token);
 	}
-
 }
diff --git a/lib/Service/MailService.php b/lib/Service/MailService.php
index c7ad07f..cf15dc7 100644
--- a/lib/Service/MailService.php
+++ b/lib/Service/MailService.php
@@ -68,7 +68,7 @@ class MailService {
 	 * @throws RegistrationException
 	 */
 	public function validateEmail($email) {
-		if ( !$this->mailer->validateMailAddress($email) ) {
+		if (!$this->mailer->validateMailAddress($email)) {
 			throw new RegistrationException($this->l10n->t('The email address you entered is not valid'));
 		}
 	}
@@ -79,7 +79,7 @@ class MailService {
 	 * @throws RegistrationException
 	 */
 	public function sendTokenByMail(Registration $registration) {
-		$link = $this->urlGenerator->linkToRoute('registration.register.verifyToken', array('token' => $registration->getToken()));
+		$link = $this->urlGenerator->linkToRoute('registration.register.verifyToken', ['token' => $registration->getToken()]);
 		$link = $this->urlGenerator->getAbsoluteURL($link);
 		$template_var = [
 			'link' => $link,
@@ -99,7 +99,7 @@ class MailService {
 		$message->setPlainBody($plaintext_part);
 		$message->setHtmlBody($html_part);
 		$failed_recipients = $this->mailer->send($message);
-		if ( !empty($failed_recipients) ) {
+		if (!empty($failed_recipients)) {
 			throw new RegistrationException($this->l10n->t('A problem occurred sending email, please contact your administrator.'));
 		}
 	}
@@ -125,10 +125,10 @@ class MailService {
 			}
 		}
 
-		$to_arr = array();
-		foreach ( $admin_users as $au ) {
+		$to_arr = [];
+		foreach ($admin_users as $au) {
 			$au_email = $au->getEMailAddress();
-			if ( $au_email && $au->isEnabled()) {
+			if ($au_email && $au->isEnabled()) {
 				$to_arr[$au_email] = $au->getDisplayName();
 			}
 		}
@@ -147,7 +147,7 @@ class MailService {
 	 * @throws \Exception
 	 */
 	private function sendNewUserNotifEmail(array $to, $username, $userIsEnabled) {
-		if ( $this->config->getAppValue('core', 'vendor', '') === 'nextcloud' ) {
+		if ($this->config->getAppValue('core', 'vendor', '') === 'nextcloud') {
 			$link = $this->urlGenerator->linkToRouteAbsolute('settings.Users.usersList');
 		} else {
 			$link = $this->urlGenerator->linkToRouteAbsolute('user_management.users');
@@ -182,8 +182,8 @@ class MailService {
 		$message->setPlainBody($plaintext_part);
 		$message->setHtmlBody($html_part);
 		$failed_recipients = $this->mailer->send($message);
-		if ( !empty($failed_recipients) )
+		if (!empty($failed_recipients)) {
 			throw new RegistrationException('Failed recipients: '.print_r($failed_recipients, true));
+		}
 	}
-
 }
diff --git a/lib/Service/RegistrationException.php b/lib/Service/RegistrationException.php
index b3070d1..deabe6c 100644
--- a/lib/Service/RegistrationException.php
+++ b/lib/Service/RegistrationException.php
@@ -24,7 +24,6 @@
 namespace OCA\Registration\Service;
 
 class RegistrationException extends \Exception {
-
 	protected $hint;
 
 	/**
@@ -45,5 +44,4 @@ class RegistrationException extends \Exception {
 	public function getHint() {
 		return $this->hint;
 	}
-
-}
\ No newline at end of file
+}
diff --git a/lib/Service/RegistrationService.php b/lib/Service/RegistrationService.php
index 7a0e3fc..592801b 100644
--- a/lib/Service/RegistrationService.php
+++ b/lib/Service/RegistrationService.php
@@ -87,7 +87,7 @@ class RegistrationService {
 
 	public function __construct($appName, MailService $mailService, IL10N $l10n, IURLGenerator $urlGenerator,
 								RegistrationMapper $registrationMapper, IUserManager $userManager, IConfig $config, IGroupManager $groupManager, Defaults $defaults,
-								ISecureRandom $random, IUserSession $us, IRequest $request, ILogger $logger, ISession $session, IProvider $tokenProvider, ICrypto $crypto){
+								ISecureRandom $random, IUserSession $us, IRequest $request, ILogger $logger, ISession $session, IProvider $tokenProvider, ICrypto $crypto) {
 		$this->appName = $appName;
 		$this->mailService = $mailService;
 		$this->l10n = $l10n;
@@ -134,13 +134,14 @@ class RegistrationService {
 		$registration->setEmail($email);
 		$registration->setUsername($username);
 		$registration->setDisplayname($displayname);
-		if($password !== "") {
+		if ($password !== "") {
 			$password = $this->crypto->encrypt($password);
 			$registration->setPassword($password);
 		}
 		$this->registrationMapper->generateNewToken($registration);
-		if ( $password !== '' && $username !== '' )
+		if ($password !== '' && $username !== '') {
 			$this->registrationMapper->generateClientSecret($registration);
+		}
 		$this->registrationMapper->insert($registration);
 		return $registration;
 	}
@@ -151,15 +152,15 @@ class RegistrationService {
 	 * @throws RegistrationException
 	 */
 	public function validateEmail($email) {
-
 		$this->mailService->validateEmail($email);
 
 		// check for pending registrations
 		try {
 			return $this->registrationMapper->find($email);//if not found DB will throw a exception
-		} catch (DoesNotExistException $e) {}
+		} catch (DoesNotExistException $e) {
+		}
 
-		if ( $this->userManager->getByEmail($email) ) {
+		if ($this->userManager->getByEmail($email)) {
 			throw new RegistrationException(
 				$this->l10n->t('A user has already taken this email, maybe you already have an account?'),
 				$this->l10n->t('You can <a href="%s">log in now</a>.', [$this->urlGenerator->getAbsoluteURL('/')])
@@ -182,7 +183,7 @@ class RegistrationService {
 	 * @throws RegistrationException
 	 */
 	public function validateDisplayname($displayname) {
-		if($displayname === "") {
+		if ($displayname === "") {
 			throw new RegistrationException($this->l10n->t('Please provide a valid display name.'));
 		}
 	}
@@ -192,11 +193,11 @@ class RegistrationService {
 	 * @throws RegistrationException
 	 */
 	public function validateUsername($username) {
-		if($username === "") {
+		if ($username === "") {
 			throw new RegistrationException($this->l10n->t('Please provide a valid user name.'));
 		}
 
-		if($this->registrationMapper->usernameIsPending($username) || $this->userManager->get($username) !== null) {
+		if ($this->registrationMapper->usernameIsPending($username) || $this->userManager->get($username) !== null) {
 			throw new RegistrationException($this->l10n->t('The username you have chosen already exists.'));
 		}
 	}
@@ -209,7 +210,7 @@ class RegistrationService {
 	 */
 	public function checkAllowedDomains($email) {
 		$allowed_domains = $this->config->getAppValue($this->appName, 'allowed_domains', '');
-		if ( $allowed_domains !== '' ) {
+		if ($allowed_domains !== '') {
 			$allowed_domains = explode(';', $allowed_domains);
 			$allowed = false;
 			foreach ($allowed_domains as $domain) {
@@ -257,7 +258,7 @@ class RegistrationService {
 	 * @throws RegistrationException|\InvalidTokenException
 	 */
 	public function createAccount(Registration &$registration, $username = null, $password = null) {
-		if($password === null && $registration->getPassword() === null) {
+		if ($password === null && $registration->getPassword() === null) {
 			$generatedPassword = $this->generateRandomDeviceToken();
 			$registration->setPassword($this->crypto->encrypt($generatedPassword));
 		}
@@ -266,7 +267,7 @@ class RegistrationService {
 			$username = $registration->getUsername();
 		}
 
-		if($registration->getPassword() !== null) {
+		if ($registration->getPassword() !== null) {
 			$password = $this->crypto->decrypt($registration->getPassword());
 		}
 
@@ -293,9 +294,9 @@ class RegistrationService {
 
 		// Add user to group
 		$registered_user_group = $this->config->getAppValue($this->appName, 'registered_user_group', 'none');
-		if ( $registered_user_group !== 'none' ) {
+		if ($registered_user_group !== 'none') {
 			$group = $this->groupManager->get($registered_user_group);
-			if ( $group === null ) {
+			if ($group === null) {
 				// This might happen if $registered_user_group is deleted after setting the value
 				// Here I choose to log error instead of stopping the user to register
 				$this->logger->error("You specified newly registered users be added to '$registered_user_group' group, but it does not exist.");
@@ -318,7 +319,7 @@ class RegistrationService {
 		// with client secret implies registered via API
 		// without client secret implies registered via form
 		// if registered via API, the registration request will be deleted in apicontroller::status
-		if($registration->getClientSecret() === null) {
+		if ($registration->getClientSecret() === null) {
 			$res = $this->registrationMapper->delete($registration);
 			if ($res === false) {
 				throw new RegistrationException($this->l10n->t('Failed to delete pending registration request'));
@@ -417,7 +418,7 @@ class RegistrationService {
 		if ($decrypt) {
 			$password = $this->crypto->decrypt($password);
 		}
-		if ( method_exists($this->usersession, 'createSessionToken') ) {
+		if (method_exists($this->usersession, 'createSessionToken')) {
 			$this->usersession->login($username, $password);
 			$this->usersession->createSessionToken($this->request, $userId, $username, $password);
 			return new RedirectResponse($this->urlGenerator->linkTo('', 'index.php'));
@@ -427,14 +428,13 @@ class RegistrationService {
 			$logintoken = $this->random->generate(32);
 			$this->config->setUserValue($userId, 'login_token', $logintoken, time());
 			\OC_User::setMagicInCookie($userId, $logintoken);
-            \OC_Util::redirectToDefaultPage();
+			\OC_Util::redirectToDefaultPage();
 		}
 		// Render message in case redirect failed
 		return new TemplateResponse('registration', 'message',
 			['msg' => $this->l10n->t('Your account has been successfully created, you can <a href="%s">log in now</a>.', [$this->urlGenerator->getAbsoluteURL('/')])]
 			, 'guest'
 		);
-
 	}
 
 	/**
@@ -451,5 +451,4 @@ class RegistrationService {
 			}
 		}
 	}
-
 }
diff --git a/lib/Settings/RegistrationSettings.php b/lib/Settings/RegistrationSettings.php
index 92a9363..bbb36fb 100644
--- a/lib/Settings/RegistrationSettings.php
+++ b/lib/Settings/RegistrationSettings.php
@@ -1,7 +1,7 @@
 <?php
+
 namespace OCA\Registration\Settings;
 
-use OCP\AppFramework\Http\TemplateResponse;
 use OCP\Settings\ISettings;
 
 use OCA\Registration\Controller\SettingsController;
@@ -31,5 +31,3 @@ class RegistrationSettings implements ISettings {
 		return $this->getSection();
 	}
 }
-
-?>
diff --git a/lib/Util/CoreBridge.php b/lib/Util/CoreBridge.php
index 5fc2124..3875dd5 100644
--- a/lib/Util/CoreBridge.php
+++ b/lib/Util/CoreBridge.php
@@ -2,80 +2,77 @@
 
 namespace OCA\Registration\Util;
 
-class CoreBridge
-{
-    /**
-     * This function maps an exception class to the available exception class of the core
-     * in order to provide cross-core and cross-version compatibility.
-     *
-     * @param string $className
-     * @return string
-     * @throws \LogicException
-     */
-    public static function exceptionClass($className)
-    {
-        static $classes = [
-            'OCSException'           => [
-                'OCP\AppFramework\OCS\OCSException',
-                'OC\OCS\Exception',
-            ],
-            'OCSBadRequestException' => [
-                'OCP\AppFramework\OCS\OCSBadRequestException',
-                'OC\OCS\Exception',
-            ],
-            'OCSNotFoundException'   => [
-                'OCP\AppFramework\OCS\OCSNotFoundException',
-                'OC\OCS\Exception',
-            ],
-            'DoesNotExistException'  => [
-                'OCP\AppFramework\Db\DoesNotExistException',
-                'OCP\AppFramework\Db\DoesNotExistException',
-            ],
-        ];
+class CoreBridge {
+	/**
+	 * This function maps an exception class to the available exception class of the core
+	 * in order to provide cross-core and cross-version compatibility.
+	 *
+	 * @param string $className
+	 * @return string
+	 * @throws \LogicException
+	 */
+	public static function exceptionClass($className) {
+		static $classes = [
+			'OCSException'           => [
+				'OCP\AppFramework\OCS\OCSException',
+				'OC\OCS\Exception',
+			],
+			'OCSBadRequestException' => [
+				'OCP\AppFramework\OCS\OCSBadRequestException',
+				'OC\OCS\Exception',
+			],
+			'OCSNotFoundException'   => [
+				'OCP\AppFramework\OCS\OCSNotFoundException',
+				'OC\OCS\Exception',
+			],
+			'DoesNotExistException'  => [
+				'OCP\AppFramework\Db\DoesNotExistException',
+				'OCP\AppFramework\Db\DoesNotExistException',
+			],
+		];
 
-        if (!array_key_exists($className, $classes)) {
-            throw new \LogicException('No valid exception class found');
-        }
+		if (!array_key_exists($className, $classes)) {
+			throw new \LogicException('No valid exception class found');
+		}
 
-        foreach ($classes[$className] as $class) {
-            if (class_exists($class)) {
-                return $class;
-            }
-        }
+		foreach ($classes[$className] as $class) {
+			if (class_exists($class)) {
+				return $class;
+			}
+		}
 
-        throw new \LogicException('No valid exception class found');
-    }
+		throw new \LogicException('No valid exception class found');
+	}
 
-    /**
-     * @param string      $className
-     * @param null|string $message
-     * @param null|int    $code
-     * @return \Exception
-     */
-    public static function createException($className, $message = null, $code = null)
-    {
-        $exceptionClassName = self::exceptionClass($className);
+	/**
+	 * @param string      $className
+	 * @param null|string $message
+	 * @param null|int    $code
+	 * @return \Exception
+	 */
+	public static function createException($className, $message = null, $code = null) {
+		$exceptionClassName = self::exceptionClass($className);
 
-        $reflection = new \ReflectionClass($exceptionClassName);
-        $params = $reflection->getConstructor()->getParameters();
+		$reflection = new \ReflectionClass($exceptionClassName);
+		$params = $reflection->getConstructor()->getParameters();
 
-        if ($params[0]->getClass() && ($params[0]->getClass()->getName() === 'OC\OCS\Result' || $params[0]->getClass()->getName() === 'OC_OCS_Result')) {
-            $subClass = $params[0]->getClass()->getName();
-            return new $exceptionClassName(new $subClass($message, $code));
-        }
+		if ($params[0]->getClass() && ($params[0]->getClass()->getName() === 'OC\OCS\Result' || $params[0]->getClass()->getName() === 'OC_OCS_Result')) {
+			$subClass = $params[0]->getClass()->getName();
+			return new $exceptionClassName(new $subClass($message, $code));
+		}
 
-        if (count($params) >= 2) {
-            if ($params[1]->getClass() && $params[1]->getClass()->getName() === 'Exception') {
-                return new $exceptionClassName($message);
-            }
+		if (count($params) >= 2) {
+			if ($params[1]->getClass() && $params[1]->getClass()->getName() === 'Exception') {
+				return new $exceptionClassName($message);
+			}
 
-            return new $exceptionClassName($message, $code);
-        }
+			return new $exceptionClassName($message, $code);
+		}
 
-        if ($exceptionClassName === 'OCP\AppFramework\OCS\OCSNotFoundException') {
-            return new $exceptionClassName($message);
-        }
+		if ($exceptionClassName === 'OCP\AppFramework\OCS\OCSNotFoundException') {
+			return new $exceptionClassName($message);
+		}
 
-        return new $exceptionClassName();
-    }
+		return new $exceptionClassName();
+	}
 }
diff --git a/templates/admin.php b/templates/admin.php
index e778d93..faf6ff4 100644
--- a/templates/admin.php
+++ b/templates/admin.php
@@ -8,7 +8,7 @@ script('registration', 'settings');
 	<select id="registered_user_group" name="registered_user_group">
 		<option value="none" <?php echo $_['current'] === 'none' ? 'selected="selected"' : ''; ?>><?php p($l->t('None')); ?></option>
 <?php
-foreach ( $_['groups'] as $group ) {
+foreach ($_['groups'] as $group) {
 	$selected = $_['current'] === $group ? 'selected="selected"' : '';
 	echo '<option value="'.$group.'" '.$selected.'>'.$group.'</option>';
 }
@@ -25,7 +25,9 @@ foreach ( $_['groups'] as $group ) {
 
 	<p>
 	<label for="admin_approval_required"><?php p($l->t('Require admin approval?')); ?>
-	<input type="checkbox" id="admin_approval_required" name="admin_approval_required" <?php if($_['approval_required'] === "yes" ) echo " checked"; ?>>
+	<input type="checkbox" id="admin_approval_required" name="admin_approval_required" <?php if ($_['approval_required'] === "yes") {
+	echo " checked";
+} ?>>
 	</label>
 	</p>
 </form>
diff --git a/templates/domains.php b/templates/domains.php
index 08cb3dd..111ed9e 100644
--- a/templates/domains.php
+++ b/templates/domains.php
@@ -4,7 +4,7 @@
 <ul class="error-wide">
 	<li class='error'><?php p($l->t('Registration is only allowed for the following domains:')); ?>
 	<?php
-	foreach ($_['domains'] as $domain ){
+	foreach ($_['domains'] as $domain) {
 		echo "<p class='hint'>";
 		p($domain);
 		echo "</p>";
diff --git a/templates/email.newuser.disabled_html.php b/templates/email.newuser.disabled_html.php
index 8670e62..4076f46 100644
--- a/templates/email.newuser.disabled_html.php
+++ b/templates/email.newuser.disabled_html.php
@@ -1,3 +1,4 @@
 <?php
+
 echo $l->t('A new user "%s" has created an account on %s and awaits admin approbation', [$_['user'], $_['sitename']]);
 echo str_replace('{link}', $_['link'], '<br/><br/><a href="{link}">{link}</a>');
diff --git a/templates/email.newuser.disabled_plaintext.php b/templates/email.newuser.disabled_plaintext.php
index 3b16a8d..6db76bc 100644
--- a/templates/email.newuser.disabled_plaintext.php
+++ b/templates/email.newuser.disabled_plaintext.php
@@ -1,3 +1,4 @@
 <?php
+
 echo $l->t('A new user "%s" has created an account on %s and awaits admin approbation', [$_['user'], $_['sitename']]);
 echo "\n\n".$_['link'];
diff --git a/templates/email.newuser_html.php b/templates/email.newuser_html.php
index c7ab1ee..51865e3 100644
--- a/templates/email.newuser_html.php
+++ b/templates/email.newuser_html.php
@@ -1,2 +1,3 @@
 <?php
+
 echo $l->t('A new user "%s" has created an account on %s', [$_['user'], $_['sitename']]);
diff --git a/templates/email.newuser_plaintext.php b/templates/email.newuser_plaintext.php
index c7ab1ee..51865e3 100644
--- a/templates/email.newuser_plaintext.php
+++ b/templates/email.newuser_plaintext.php
@@ -1,2 +1,3 @@
 <?php
+
 echo $l->t('A new user "%s" has created an account on %s', [$_['user'], $_['sitename']]);
diff --git a/templates/email.validate_html.php b/templates/email.validate_html.php
index 30880f7..3f0960c 100644
--- a/templates/email.validate_html.php
+++ b/templates/email.validate_html.php
@@ -1,3 +1,4 @@
 <?php
+
 echo $l->t('To create a new account on %s, just click the following link:', [$_['sitename']]);
 echo str_replace('{link}', $_['link'], '<br/><br/><a href="{link}">{link}</a>');
diff --git a/templates/email.validate_plaintext.php b/templates/email.validate_plaintext.php
index 4a1dbdb..3d07fab 100644
--- a/templates/email.validate_plaintext.php
+++ b/templates/email.validate_plaintext.php
@@ -1,3 +1,4 @@
 <?php
+
 echo $l->t("To create a new account on %s, just click the following link:", [$_['sitename']]);
 echo "\n\n".$_['link'];
diff --git a/templates/form.php b/templates/form.php
index 924472e..5253ec9 100644
--- a/templates/form.php
+++ b/templates/form.php
@@ -1,14 +1,15 @@
 <?php
 \OCP\Util::addStyle('registration', 'style');
 \OCP\Util::addScript('registration', 'form');
-if ( \OCP\Util::getVersion()[0] >= 12 )
+if (\OCP\Util::getVersion()[0] >= 12) {
 	\OCP\Util::addStyle('core', 'guest');
-?><form action="<?php print_unescaped(\OC::$server->getURLGenerator()->linkToRoute('registration.register.createAccount', array('token'=>$_['token']))) ?>" method="post">
+}
+?><form action="<?php print_unescaped(\OC::$server->getURLGenerator()->linkToRoute('registration.register.createAccount', ['token'=>$_['token']])) ?>" method="post">
 	<input type="hidden" name="requesttoken" value="<?php p($_['requesttoken']) ?>" />
 	<fieldset>
-		<?php if ( !empty($_['errormsgs']) ) {?>
+		<?php if (!empty($_['errormsgs'])) {?>
 		<ul class="error">
-			<?php foreach ( $_['errormsgs'] as $errormsg ) { ?>
+			<?php foreach ($_['errormsgs'] as $errormsg) { ?>
 			<li><?php p($errormsg); ?></li>
 			<?php } ?>
 		</ul>
@@ -24,16 +25,18 @@ if ( \OCP\Util::getVersion()[0] >= 12 )
 		</p>
 
 		<p class="groupmiddle">
-			<input type="text" name="username" id="username" value="<?php if (!empty($_['entered_data']['user'])) { p($_['entered_data']['user']); } ?>" placeholder="<?php p($l->t('Username')); ?>" />
+			<input type="text" name="username" id="username" value="<?php if (!empty($_['entered_data']['user'])) {
+	p($_['entered_data']['user']);
+} ?>" placeholder="<?php p($l->t('Username')); ?>" />
 			<label for="username" class="infield"><?php p($l->t('Username')); ?></label>
 			<img id="username-icon" class="svg" src="<?php print_unescaped(image_path('', 'actions/user.svg')); ?>" alt=""/>
 		</p>
 
 		<p class="groupbottom">
 			<input type="password" name="password" id="password" placeholder="<?php p($l->t('Password')); ?>"/>
-			<label for="password" class="infield"><?php p($l->t( 'Password' )); ?></label>
+			<label for="password" class="infield"><?php p($l->t('Password')); ?></label>
 			<img id="password-icon" class="svg" src="<?php print_unescaped(image_path('', 'actions/password.svg')); ?>" alt=""/>
-			<?php if ( \OC::$server->getConfig()->getAppValue('core', 'vendor', '') === 'nextcloud' ) { ?>
+			<?php if (\OC::$server->getConfig()->getAppValue('core', 'vendor', '') === 'nextcloud') { ?>
 			<input id="show" name="show" type="checkbox">
 			<label id="show-password" style="display: inline;" for="show"></label>
 			<?php } else { ?>
diff --git a/templates/message.php b/templates/message.php
index 5a7fa31..7c8a315 100644
--- a/templates/message.php
+++ b/templates/message.php
@@ -1,7 +1,8 @@
 <?php
 \OCP\Util::addStyle('registration', 'style');
-if ( \OCP\Util::getVersion()[0] >= 12 )
-        \OCP\Util::addStyle('core', 'guest')
+if (\OCP\Util::getVersion()[0] >= 12) {
+	\OCP\Util::addStyle('core', 'guest');
+}
 ?>
 <ul class="msg error-wide nc-theming-main-text">
 	<li><?php print_unescaped($_['msg'])?></li>
diff --git a/templates/register.php b/templates/register.php
index 935b884..cccd8ba 100644
--- a/templates/register.php
+++ b/templates/register.php
@@ -1,7 +1,8 @@
 <?php
 \OCP\Util::addStyle('registration', 'style');
-if ( \OCP\Util::getVersion()[0] >= 12 )
+if (\OCP\Util::getVersion()[0] >= 12) {
 	\OCP\Util::addStyle('core', 'guest');
+}
 if ($_['entered']): ?>
 	<?php if (empty($_['errormsg'])): ?>
 		<ul class="success">
@@ -17,7 +18,7 @@ if ($_['entered']): ?>
 				</ul>
 				<p class="groupofone">
 					<input type="email" name="email" id="email" placeholder="<?php p($l->t('Email')); ?>" value="" required autofocus />
-					<label for="email" class="infield"><?php p($l->t( 'Email' )); ?></label>
+					<label for="email" class="infield"><?php p($l->t('Email')); ?></label>
 					<img id="email-icon" class="svg" src="<?php print_unescaped(image_path('', 'actions/mail.svg')); ?>" alt=""/>
 				</p>
 				<input type="hidden" name="requesttoken" value="<?php p($_['requesttoken']); ?>" />
diff --git a/tests/Integration/Controller/RegisterControllerTest.php b/tests/Integration/Controller/RegisterControllerTest.php
index 3f68394..6b310e6 100644
--- a/tests/Integration/Controller/RegisterControllerTest.php
+++ b/tests/Integration/Controller/RegisterControllerTest.php
@@ -2,13 +2,9 @@
 
 namespace OCA\Registration\Tests\Integration\Controller;
 
-use OCA\Registration\Db\Registration;
 use OCA\Registration\Db\RegistrationMapper;
 use OCA\Registration\Service\MailService;
 use OCA\Registration\Service\RegistrationService;
-use OCA\Registration\Util\CoreBridge;
-use OCP\AppFramework\Http;
-use OCP\AppFramework\Http\DataResponse;
 use OCP\Defaults;
 use OCP\IConfig;
 use OCP\IGroupManager;
@@ -19,7 +15,6 @@ use OCP\IRequest;
 use OCP\Security\ISecureRandom;
 use OCP\Security\ICrypto;
 use OCP\ISession;
-use OCP\IUser;
 use OCP\IURLGenerator;
 use OCP\IUserManager;
 use OCP\IUserSession;
@@ -28,6 +23,7 @@ use \OCP\AppFramework\Http\TemplateResponse;
 
 use ChristophWurst\Nextcloud\Testing\DatabaseTransaction;
 use ChristophWurst\Nextcloud\Testing\TestCase;
+
 /**
  * class RegistrationControllerTest
  *
@@ -67,7 +63,7 @@ class RegisterControllerTest extends TestCase {
 	/** @var ICrypto */
 	private $crypto;
 
-	public function setUp (): void {
+	public function setUp(): void {
 		parent::setUp();
 		$this->mailService = $this->createMock(MailService::class);
 		$this->l10n = $this->createMock(IL10N::class);
@@ -134,9 +130,9 @@ class RegisterControllerTest extends TestCase {
 
 		$ret = $this->controller->validateEmail($email);
 
-		$expected = new TemplateResponse('registration', 'message', array('msg' =>
+		$expected = new TemplateResponse('registration', 'message', ['msg' =>
 			$this->l10n->t('Verification email successfully sent.')
-		), 'guest');
+		], 'guest');
 
 
 		$this->assertEquals($expected, $ret, print_r($ret, true));
diff --git a/tests/Integration/Service/RegistrationServiceTest.php b/tests/Integration/Service/RegistrationServiceTest.php
index d192dc4..72392ca 100644
--- a/tests/Integration/Service/RegistrationServiceTest.php
+++ b/tests/Integration/Service/RegistrationServiceTest.php
@@ -6,9 +6,6 @@ use OCA\Registration\Db\Registration;
 use OCA\Registration\Db\RegistrationMapper;
 use OCA\Registration\Service\MailService;
 use OCA\Registration\Service\RegistrationService;
-use OCA\Registration\Util\CoreBridge;
-use OCP\AppFramework\Http;
-use OCP\AppFramework\Http\DataResponse;
 use OCP\Defaults;
 use OCP\IConfig;
 use OCP\IGroupManager;
@@ -26,6 +23,7 @@ use OCP\IUserSession;
 
 use ChristophWurst\Nextcloud\Testing\DatabaseTransaction;
 use ChristophWurst\Nextcloud\Testing\TestCase;
+
 /**
  * class RegistrationServiceTest
  *
@@ -65,7 +63,7 @@ class RegistrationServiceTest extends TestCase {
 	/** @var ICrypto */
 	private $crypto;
 
-	public function setUp (): void {
+	public function setUp(): void {
 		parent::setUp();
 		$this->mailService = $this->createMock(MailService::class);
 		$this->l10n = $this->createMock(IL10N::class);
@@ -202,7 +200,7 @@ class RegistrationServiceTest extends TestCase {
 
 		$this->config->expects($this->atLeastOnce())
 			->method('getAppValue')
-			->will($this->returnCallback(array($this, 'settingsCallback1')));
+			->will($this->returnCallback([$this, 'settingsCallback1']));
 
 
 		$form_input_username = 'alice1';
diff --git a/tests/Unit/Controller/ApiControllerTest.php b/tests/Unit/Controller/ApiControllerTest.php
index 1229ddc..2f0221f 100644
--- a/tests/Unit/Controller/ApiControllerTest.php
+++ b/tests/Unit/Controller/ApiControllerTest.php
@@ -38,7 +38,7 @@ class ApiControllerTest extends TestCase {
 	/** @var ApiController */
 	private $controller;
 
-	public function setUp (): void {
+	public function setUp(): void {
 		parent::setUp();
 		$this->request = $this->createMock(IRequest::class);
 		$this->registrationService = $this->createMock(RegistrationService::class);
@@ -79,9 +79,9 @@ class ApiControllerTest extends TestCase {
 	}
 
 	public function testValidateFailEmail() {
-        $exception = CoreBridge::createException('OCSException', '', 999);
+		$exception = CoreBridge::createException('OCSException', '', 999);
 
-        $this->expectException(get_class($exception));
+		$this->expectException(get_class($exception));
 
 		$this->registrationService
 			->expects($this->once())
@@ -92,11 +92,11 @@ class ApiControllerTest extends TestCase {
 	}
 
 	public function testValidateFailDisplayname() {
-        $exception = CoreBridge::createException('OCSException', '', 999);
+		$exception = CoreBridge::createException('OCSException', '', 999);
 
-        $this->expectException(get_class($exception));
+		$this->expectException(get_class($exception));
 
-        $this->registrationService
+		$this->registrationService
 			->expects($this->once())
 			->method('validateDisplayname')
 			->willThrowException($exception);
@@ -105,11 +105,11 @@ class ApiControllerTest extends TestCase {
 	}
 
 	public function testValidateFailUsername() {
-        $exception = CoreBridge::createException('OCSException', '', 999);
+		$exception = CoreBridge::createException('OCSException', '', 999);
 
-        $this->expectException(get_class($exception));
+		$this->expectException(get_class($exception));
 
-        $this->registrationService
+		$this->registrationService
 			->expects($this->once())
 			->method('validateUsername')
 			->willThrowException($exception);
@@ -118,9 +118,9 @@ class ApiControllerTest extends TestCase {
 	}
 
 	public function testStatusNoRegistration() {
-        $exception = CoreBridge::createException('OCSNotFoundException', '', 404);
+		$exception = CoreBridge::createException('OCSNotFoundException', '', 404);
 
-        $this->expectException(get_class($exception));
+		$this->expectException(get_class($exception));
 
 		$this->registrationService
 			->method('getRegistrationForSecret')