def login():
    with open("student_records.csv", "r") as file:
        read=csv.reader(file)
        invalid_login = True
        while invalid_login == True:
            username = input ('What is your username')
            password = input ('What is your password')
            for each in read:
                print (each)
                if username in each and password in each:
                    print ('record was found')
                    invalid_login = False
                    test()

            else:
                break
                print('Incorrect username or password')