SAML2: Included parsed groups in dump data

Updated code style of class while there.
Removed redundant check and string translation used.

For #4706

app/Access/Saml2Service.php

@@ -21,19 +21,13 @@ use OneLogin\Saml2\ValidationError;
 class Saml2Service
 {
     protected array $config;
-    protected RegistrationService $registrationService;
-    protected LoginService $loginService;
-    protected GroupSyncService $groupSyncService;
 
     public function __construct(
-        RegistrationService $registrationService,
-        LoginService $loginService,
-        GroupSyncService $groupSyncService
+        protected RegistrationService $registrationService,
+        protected LoginService $loginService,
+        protected GroupSyncService $groupSyncService
     ) {
         $this->config = config('saml2');
-        $this->registrationService = $registrationService;
-        $this->loginService = $loginService;
-        $this->groupSyncService = $groupSyncService;
     }
 
     /**
@@ -357,6 +351,10 @@ class Saml2Service
         $userDetails = $this->getUserDetails($samlID, $samlAttributes);
         $isLoggedIn = auth()->check();
 
+        if ($this->shouldSyncGroups()) {
+            $userDetails['groups'] = $this->getUserGroups($samlAttributes);
+        }
+
         if ($this->config['dump_user_details']) {
             throw new JsonDebugException([
                 'id_from_idp'         => $samlID,
@@ -379,13 +377,8 @@ class Saml2Service
             $userDetails['external_id']
         );
 
-        if ($user === null) {
-            throw new SamlException(trans('errors.saml_user_not_registered', ['name' => $userDetails['external_id']]), '/login');
-        }
-
         if ($this->shouldSyncGroups()) {
-            $groups = $this->getUserGroups($samlAttributes);
-            $this->groupSyncService->syncUserWithFoundGroups($user, $groups, $this->config['remove_from_groups']);
+            $this->groupSyncService->syncUserWithFoundGroups($user, $userDetails['groups'], $this->config['remove_from_groups']);
         }
 
         $this->loginService->login($user, 'saml2');

lang/en/errors.php

@@ -19,7 +19,6 @@ return [
     'ldap_extension_not_installed' => 'LDAP PHP extension not installed',
     'ldap_cannot_connect' => 'Cannot connect to ldap server, Initial connection failed',
     'saml_already_logged_in' => 'Already logged in',
-    'saml_user_not_registered' => 'The user :name is not registered and automatic registration is disabled',
     'saml_no_email_address' => 'Could not find an email address, for this user, in the data provided by the external authentication system',
     'saml_invalid_response_id' => 'The request from the external authentication system is not recognised by a process started by this application. Navigating back after a login could cause this issue.',
     'saml_fail_authed' => 'Login using :system failed, system did not provide successful authorization',