def METHOD_NAME(sender, instance, created, **kwargs):
    """
    Creating new membership with associated user. If the user is the project owner we don't
    do anything because that info will be shown in created project timeline entry
    @param sender: Membership model
    @param instance: Membership object
    """
    # We shown in created project timeline entry
    if created and instance.user and instance.user != instance.project.owner:
        created_datetime = instance.created_at
        _push_to_timelines(instance.project, instance.user, instance, "create", created_datetime)