influxdb fails on each hook tryiing to re-create an existing user

[Nick Moffitt]

2018-10-09 08:41:22 DEBUG update-status Traceback (most recent call last):
2018-10-09 08:41:22 DEBUG update-status File "/var/lib/juju/agents/unit-influxdb-0/charm/hooks/update-status", line 19, in <module>
2018-10-09 08:41:22 DEBUG update-status main()
2018-10-09 08:41:22 DEBUG update-status File "/var/lib/juju/agents/unit-influxdb-0/.venv/lib/python3.5/site-packages/charms/reactive/__init__.py", line 72, in main
2018-10-09 08:41:22 DEBUG update-status bus.dispatch(restricted=restricted_mode)
2018-10-09 08:41:22 DEBUG update-status File "/var/lib/juju/agents/unit-influxdb-0/.venv/lib/python3.5/site-packages/charms/reactive/bus.py", line 375, in dispatch
2018-10-09 08:41:22 DEBUG update-status _invoke(other_handlers)
2018-10-09 08:41:22 DEBUG update-status File "/var/lib/juju/agents/unit-influxdb-0/.venv/lib/python3.5/site-packages/charms/reactive/bus.py", line 351, in _invoke
2018-10-09 08:41:22 DEBUG update-status handler.invoke()
2018-10-09 08:41:22 DEBUG update-status File "/var/lib/juju/agents/unit-influxdb-0/.venv/lib/python3.5/site-packages/charms/reactive/bus.py", line 173, in invoke
2018-10-09 08:41:22 DEBUG update-status self._action(*args)
2018-10-09 08:41:22 DEBUG update-status File "/var/lib/juju/agents/unit-influxdb-0/charm/reactive/influxdb.py", line 290, in create_nagios_influxdb_user
2018-10-09 08:41:22 DEBUG update-status create_influxdb_user('nagios', admin=True, local_user='nagios')
2018-10-09 08:41:22 DEBUG update-status File "/var/lib/juju/agents/unit-influxdb-0/charm/reactive/influxdb.py", line 90, in create_influxdb_user
2018-10-09 08:41:22 DEBUG update-status influx.create_user(username, password, admin=admin)
2018-10-09 08:41:22 DEBUG update-status File "/usr/lib/python3/dist-packages/influxdb/client.py", line 649, in create_user
2018-10-09 08:41:22 DEBUG update-status self.query(text)
2018-10-09 08:41:22 DEBUG update-status File "/usr/lib/python3/dist-packages/influxdb/client.py", line 333, in query
2018-10-09 08:41:22 DEBUG update-status in data.get('results', [])
2018-10-09 08:41:22 DEBUG update-status File "/usr/lib/python3/dist-packages/influxdb/client.py", line 332, in <listcomp>
2018-10-09 08:41:22 DEBUG update-status for result
2018-10-09 08:41:22 DEBUG update-status File "/usr/lib/python3/dist-packages/influxdb/resultset.py", line 18, in __init__
2018-10-09 08:41:22 DEBUG update-status raise InfluxDBClientError(self.error)
2018-10-09 08:41:22 DEBUG update-status influxdb.exceptions.InfluxDBClientError: user already exists
2018-10-09 08:41:22 ERROR juju.worker.uniter.operation runhook.go:114 hook "update-status" failed: exit status 1
2018-10-09 08:41:22 INFO juju.worker.uniter resolver.go:102 awaiting error resolution for "update-status" hook