Update, rebuild, and add a new API endpoint.

config/auth.php

@@ -20,6 +20,7 @@
  */
 
 declare(strict_types=1);
+use FireflyIII\User;
 
 if ('ldap' === strtolower((string)env('AUTHENTICATION_GUARD'))) {
     exit('LDAP is no longer supported by Firefly III v5.7+. Sorry about that. You will have to switch to "remote_user_guard", and use tools like Authelia or Keycloak to use LDAP together with Firefly III.');
@@ -96,11 +97,11 @@ return [
     'providers'        => [
         'users'                => [
             'driver' => 'eloquent',
-            'model'  => FireflyIII\User::class,
+            'model'  => User::class,
         ],
         'remote_user_provider' => [
             'driver' => 'remote_user_provider',
-            'model'  => FireflyIII\User::class,
+            'model'  => User::class,
         ],
     ],