@classmethod
def _make_username(cls, username):
    """
        Slugify the username and replace - with _ to meet username requirements
        """
    from django.template.defaultfilters import slugify
    from unidecode import unidecode
    slugified_name = slugify(unidecode(username)).replace('-', '_')
    slugified_name = slugified_name[:30]
    if len(username) < 4:
        slugified_name = None
    return slugified_name
