influxdb fails to relate to telegraf per instructions

When relating I get the following traceback:

2018-04-18 20:20:16 INFO juju-log query:11: Invoking reactive handler: reactive/influxdb.py:257:query_available
2018-04-18 20:20:16 ERROR juju-log query:11: Hook error:
Traceback (most recent call last):
  File "/var/lib/juju/agents/unit-influxdb-2/.venv/lib/python3.5/site-packages/charms/reactive/__init__.py", line 72, in main
    bus.dispatch(restricted=restricted_mode)
  File "/var/lib/juju/agents/unit-influxdb-2/.venv/lib/python3.5/site-packages/charms/reactive/bus.py", line 375, in dispatch
    _invoke(other_handlers)
  File "/var/lib/juju/agents/unit-influxdb-2/.venv/lib/python3.5/site-packages/charms/reactive/bus.py", line 351, in _invoke
    handler.invoke()
  File "/var/lib/juju/agents/unit-influxdb-2/.venv/lib/python3.5/site-packages/charms/reactive/bus.py", line 173, in invoke
    self._action(*args)
  File "/var/lib/juju/agents/unit-influxdb-2/charm/reactive/influxdb.py", line 261, in query_available
    query.configure(port=port)
TypeError: configure() missing 2 required positional arguments: 'username' and 'password'

Looking at the query argument it's part of <relations.influxdb-api.provides.InfluxdbApi object at 0x7f06915c0978> but looking at the interface I don't see any query method on that provides class?

https://github.com/ChrisMacNaughton/interface-influxdb-api/blob/master/provides.py