Add comprehensive tests for Gacha Credits, Auth, and User services

- Implement tests for GachaCreditsService including creation, retrieval, updating, and deletion of gacha credits.
- Add tests for AuthController covering user login, registration, email verification, and error handling for invalid credentials.
- Enhance AuthService tests to include login, registration, email verification, OTP resend, password reset, and token refresh functionalities.
- Create tests for UsersService to validate user creation, retrieval, updating, deletion, and fetching by email.
- Ensure all tests utilize a consistent setup and teardown process for database interactions.

tests/src/lib.rs

@@ -99,3 +99,15 @@ pub async fn setup() {
 		.unwrap();
 	seed_users_for_test(&app_state.surrealdb_ws).await.unwrap();
 }
+
+pub fn get_meta_request_dto(page: u64, per_page: u64) -> imphnen_entities::MetaRequestDto {
+    imphnen_entities::MetaRequestDto {
+        page: Some(page),
+        per_page: Some(per_page),
+        search: None,
+        sort_by: None,
+        order: None,
+        filter: None,
+        filter_by: None,
+    }
+}