add controller for signin and also basic test for it
add routes for signin and sign out
add routes in controller and also add new page under view/sessions that contains the signin
create a user signin form
add test for signin with valid information
add route create skeleton for signin
add Sessions helper
add conditional when signin for cases where user doesnt provide correct information
add cookies to be set to 20 years expiration under sign_in method
add private method for create remember token
 update form
add updates and test updates