Kivymd full app, and password cracked payload

def payload():
    payload = App.get_running_app().password_input.text
    if len(payload) <= 4:
        payload = App.get_running_app().password_input.text
        App.get_running_app().root.ids.content.ids.label.text = 'Password cannot be less than 4 Characters'
    else:
        payload = App.get_running_app().password_input.text
        App.get_running_app().root.ids.content.ids.label.text = 'Password cracked, the password is %s' %(payload)