Commit
6711079e1030edcf602c77c71b50a2ea121a87f0
by 84422910+olivergr77tsk24 Adds login and logout of user
Added section to the navigation bar to log in. Login view has been
created for the login process. Added an 'authentication' folder which
contains all the functionalities related to the user session. Also,
added several entities to make authentication easier to use.