With LDAP enabled and snap install, templating cannot use the'grafana' user

When installed from snap, and attempting to configure LDAP, we receive a traceback:

2022-03-13 22:01:10 INFO unit.grafana/0.juju-log server.go:327 Invoking reactive handler: reactive/grafana.py:1440:configure_ldap_authentication
2022-03-13 22:01:10 INFO unit.grafana/0.juju-log server.go:327 Setting up LDAP auth...

2022-03-13 22:01:10 ERROR unit.grafana/0.juju-log server.go:327 Hook error:
Traceback (most recent call last):
  File "/var/lib/juju/agents/unit-grafana-0/.venv/lib/python3.6/site-packages/charms/reactive/__init__.py", line 74, in main
    bus.dispatch(restricted=restricted_mode)
  File "/var/lib/juju/agents/unit-grafana-0/.venv/lib/python3.6/site-packages/charms/reactive/bus.py", line 390, in dispatch
    _invoke(other_handlers)
  File "/var/lib/juju/agents/unit-grafana-0/.venv/lib/python3.6/site-packages/charms/reactive/bus.py", line 359, in _invoke
    handler.invoke()
  File "/var/lib/juju/agents/unit-grafana-0/.venv/lib/python3.6/site-packages/charms/reactive/bus.py", line 181, in invoke
    self._action(*args)
  File "/var/lib/juju/agents/unit-grafana-0/charm/reactive/grafana.py", line 1464, in configure_ldap_authentication
    render_ldap_config(config, ldap_toml_path)
  File "lib/charms/layer/grafana.py", line 449, in render_ldap_config
    perms=0o600,
  File "/var/lib/juju/agents/unit-grafana-0/.venv/lib/python3.6/site-packages/charmhelpers/core/templating.py", line 92, in render
    host.write_file(target, content.encode(encoding), owner, group, perms)
  File "/var/lib/juju/agents/unit-grafana-0/.venv/lib/python3.6/site-packages/charmhelpers/core/host.py", line 546, in write_file
    uid = pwd.getpwnam(owner).pw_uid
KeyError: "getpwnam(): name not found: 'grafana'"

There is no 'grafana' user when we install from snap.