added some reminders for later. all persistence concerns have been
addressed to a minimum standard. to revisit if time allows it.
wrote tests for the readfromuser and getuserchoice() under the user
interface class.
wrote the readfromuser() under UserInterface.
passed the readfromuser test but can't partially mock readFromUser.
passed the test for get user answer as char.
created a stub for the user menu test.
wrote a stub for the behaviour of the first menu.
run the menu once.
wrote test for closing the program.
wrote impl of the deleteuser() under userMenu.
wrote a nontest test for delete existing user to check behaviour
wrote and stubbed () and tests for creating a new user in the menu.
wrote error handling for login method and renamed usermenu to login
menu.
wrote the login method and a run to see it.
wrote some notes for the next step. UserMenu prints the user's quizzes.