Create Password Manager API with specified requirements

[YoussefWaelMohamedLotfy]

The following tasks have been completed in the Backend Development Phase ✅.

• It should support creating, updating, and deleting Logins
• The Project should use Encryption for saving the passwords
• Your API should have Authorization and Authentication
• Use AutoMapper and FluentValidation
• The database should be SQL Code First

[YoussefWaelMohamedLotfy]

Closes #3