Add comprehensive tests for mentor repository and authentication

- Implemented tests for creating, retrieving, updating, and deleting mentors in `mentor_repository_test.rs`.
- Added tests for user authentication, including successful login, invalid email formats, and inactive users in `auth_login_tests.rs`.
- Created a mock test environment setup in `mock_test.rs` to facilitate database operations during tests.
- Updated module structure to include new test files for mentors and authentication.
- Ensured cleanup of the database after tests to maintain isolation and prevent side effects.

imphnen-utils/src/lib.rs

@@ -1,16 +1,13 @@
-use imphnen_entities::*;
-use imphnen_libs::*;
-
 pub mod bind_filter;
 pub mod extract_email;
 pub mod generate_date;
 pub mod generate_otp;
 pub mod get_id;
 pub mod make_thing;
-pub mod mock_test;
 pub mod query_builder;
 pub mod query_list;
 pub mod response_format;
+pub mod serde_helpers;
 pub mod validator;
 
 pub use bind_filter::*;
@@ -21,8 +18,11 @@ pub use get_id::*;
 pub use imphnen_entities::*;
 pub use imphnen_libs::*;
 pub use make_thing::*;
-pub use mock_test::*;
 pub use query_builder::*;
 pub use query_list::*;
 pub use response_format::*;
+pub use serde_helpers::{
+	option_thing_or_string, serialize_option_thing, serialize_thing,
+	string_or_empty_string, thing_or_string,
+};
 pub use validator::*;