Hia

 def login():
        print("Please enter the following below.\n")
        user = input("Username: ")
        passw = input("\nPassword: ")
        f = open("users.txt", "r")
        for line in f.readlines():
            us, pw = line.strip().split("|")
            if (user in us) and (passw in pw):
                time.sleep(1)
                print ("\nLogin successful!\n")
                time.sleep(0.5)
                print ("***************************************************************************************\n")
                menu()
                return True
        time.sleep(1)
        print ("\nWrong username/password\n")
        time.sleep(0.5)
        print ("***************************************************************************************\n")
        return False

    def signup():
        stringToSave = input("Enter your username and password like so... NAME|PASS : ")
        file_name = "users.txt"
        myFile = open("users.txt", 'a')
        myFile.write(stringToSave + '\n')
        myFile.close()
        time.sleep(2)
        print("Your account as been successfully created!\n")
        time.sleep(2)
        print ("***************************************************************************************\n")
        main()