User can log into the system to access personal tasks

As a registered user, I want to log into the system, so that I can access my personal tasks.

Acceptance Criteria:

• The user can enter a username and password on the login page.
• The system validates the credentials.
• On successful login, the user is redirected to their personal dashboard.
• On failure, an error message is displayed.

DoD:

• Login form is implemented.
• Authentication logic is complete and secure.
• User is redirected to dashboard after login.
• Error handling for failed logins is implemented.
• Unit and integration tests are written and pass.