Get a community.

def get_by_user(cls, user_id, with_deleted=False):
        """Get a community."""
        query = cls.query.filter_by(
            id_user=user_id
        )
        if not with_deleted:
            query = query.filter(cls.deleted_at.is_(None))

        return query.order_by(db.asc(Community.title))