import time
complete = False
user = [["username",""],["password",""]]

def Access():
    for n in range (len(user)):
        user[n][1] = input(user[n][0])

while not complete:
    Access()
    username = input("What is the username?")
    password = input("What is the password?")

    if username == user[n][0]:
        print("Good!")
    else:
        print("Input username again!")
    if password == user[n][1]:
        print("User has been identified, Welcome",username)
    else:
        print("Input password again")