[Authorization] Implement User Sign Out

[mehalyna]

Objective: Allow users to log out (sign out) of the application.

Sub-Tasks:

1. Invalidate JWT on Sign Out:

   • Since JWTs are stateless, consider strategies for invalidating the token on logout, such as a token blacklist or short token lifespan with refresh tokens.

2. Create Sign Out API Endpoint (Optional):

   • If implementing a token blacklist, develop an endpoint to add the user’s current token to this list upon logout.

3. Client-Side Token Deletion:

   • Ensure the client application deletes the token upon user logout for security purposes.

US #1