User Login and Logout

[EvitaKnits]

As a registered user, I want to log in using my email and password, so that I can access the issue tracker. As a registered user, I want to log out, so that I can protect my account when I am not using it.

Required Tasks

• Create a log in form that authenticates the user's inputted credentials and allows them to login only with correct ones.

Acceptance Criteria

• Given I am a registered user, When I enter the correct credentials, Then I am logged in successfully.
• Given I am a registered or unregistered user, When I do not enter correct, registered credentials, Then I am not able to log in.
• Given I am logged in, When I click 'logout', Then I am logged out successfully.

[EvitaKnits]

Changed to signing in with username and password, instead of email and password.

Otherwise all requirements met.