Version 5 is compatible with Python 3 and Django 1.8+
Version 5 removes the AuthorizedClients model and does not look there for client ids or private keys.
Client ids and private keys must be in API_KEYS in settings.
`
API_KEYS = {'client_id_X': 'private_key_X'}
`
No data are removed or tables dropped. You can make the migrations that will do such.