Add unit test for nextjs login

[mastoreto]

What problem would you like to solve or improve?

After developing a new feature, it is necessary to have unit tests for structural functionalities, such as login, shopping cart, etc.

Primarily, it is necessary to implement tests on the login since it is the most critical functionality of the store that needs to be fully functional. This way, we can ensure that it is working correctly while we continue to implement new features.

Describe your proposed solution or enhancement.

Implement testing librarys and unit test.

Considerations

• Next Auth Library
• Implement a custom signIn function
• Prisma to ORM whit Database

Describe any alternative solutions you've considered (optional).

No response

Additional context or information (optional).

Next Docs - Testing Cypress - NextJS Jest - NextJS

Code of Conduct

• [X] I agree to follow this project's Code of Conduct.

[JCruz-Dev]

@serudda I would like to take this task! In a great opportunity to learn some stuff and contribute