'Generate user multi path from display name.'

@classmethod
def slugify(cls, owner, display_name, type_='m'):

    slug = unicode_title_to_ascii(display_name)
    if isinstance(owner, Subreddit):
        prefix = (((('/r/' + owner.name) + '/') + type_) + '/')
    else:
        prefix = (((('/user/' + owner.name) + '/') + type_) + '/')
    new_path = (prefix + slug)
    try:
        existing = LabeledMultiByOwner._byID(owner._fullname)._t.keys()
    except tdb_cassandra.NotFound:
        existing = []
    count = 0
    while (new_path in existing):
        count += 1
        new_path = ((prefix + slug) + str(count))
    return new_path
