<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def safe_get_user_model():
 """ Safe loading of the User model, customized or not. """

    user_app, user_model = settings.AUTH_USER_MODEL.split('.')
    return apps.get_registered_model(user_app, user_model)