chore: modify filter description and remove expand on GET operation

Signed-off-by: matiasperrone-exo <matias.perrone@exomindset.co>

Author: matiasperrone-exo

app/Http/Controllers/Api/OAuth2/OAuth2UserRegistrationRequestApiController.php

@@ -67,16 +67,9 @@ final class OAuth2UserRegistrationRequestApiController extends OAuth2ProtectedCo
                 required: false,
                 schema: new OA\Schema(type: 'integer')
             ),
-            new OA\Parameter(
-                name: 'expand',
-                description: 'Expand relations',
-                in: 'query',
-                required: false,
-                schema: new OA\Schema(type: 'string')
-            ),
             new OA\Parameter(
                 name: 'filter',
-                description: 'Filter criteria (first_name, last_name, email, is_redeemed)',
+                description: 'Filter criteria (first_name, last_name, email, is_redeemed) ("=@" starts with, "==" exact match)',
                 in: 'query',
                 required: false,
                 schema: new OA\Schema(type: 'string')