Implement Unit Tests for `AuthenticationModule

[BrosG]

Description:

In accordance with best practices, every module, component, and service should have associated test files to ensure the code behaves as expected under different conditions. Currently, it appears that the AuthenticationModule, along with its associated components and services, lacks corresponding test files.

Implementing tests would not only ensure the reliability of the code but would also make future changes safer and easier, as the tests would alert developers to any breaking changes they inadvertently introduce.

The recommended framework for testing Angular applications is Jasmine, coupled with the Angular Testing Utility functions. Test cases should be written to cover as much of the code as possible, including both positive and negative scenarios.

The following steps need to be taken:

Create a test file for each component and service in the AuthenticationModule.
In each test file, write test cases that cover the functionality of the corresponding component or service.
Run the tests and ensure they pass.

Acceptance Criteria:
Each component and service in AuthenticationModule has a corresponding test file.
Test cases in each test file cover the functionality of the corresponding component or service.
All tests pass.
Labels: testing, unit-tests, jasmine, angular