D) (1) There is no "Login" button, just a logout. (2)the app assumes you're logged in until you decide to book a ride. (Done, Now we have given the Logout Button on the main menu screen).
BUG: Starting at the first screen you have the option to select "Passenger" or "Driver". If I choose "Driver" I am prompted for my "Username & Password" at the Login screen. If I choose "Passenger" I am brought directly to the Main Menu options. I believe the Login screen should pop up after you click on "Passenger".