CorrectUsername = "WALLACE"
CorrectPassword = "GROMIT"

loop = True
while (loop == True):
    username = input("Please enter your username: ")
    if (username == CorrectUsername):
        password = input("Please enter your password: ")
        if (password == CorrectPassword):
            print("Logged in successfully as " + username + “.”)
            loop = False
        else:
            print("Password incorrect!")
    else:
        print("Username incorrect!")