Removing contact permissions does not trigger new consent prompt

[Tibernut]

I accidentally gave indicator-kdeconnect permissions for the wrong google account when syncing my contacts for the first time. When I removed those permissions and attempted a resync I only got a 'Token has been expired or revoked from' error oauth. I was unable to add a new account until I manually deleted token.json and contacts.json from ~/.local/share/indicator-kdeconnect.

It would be good if indicator-kdeconnect had a mechanism for adding/removing a google account for contacts synchronization. Failing that, maybe it would be better to trigger self.get_consent() if self.refresh_token() fails on line 169 in indicator-kdeconnect/src/extensions/sms/sms.py.

Thank you for the great work so far!

error trace:
Exception in thread Sync:
Traceback (most recent call last):
File "/usr/share/indicator-kdeconnect/Sms.py", line 167, in get_contacts
space_requests, connections = get_connections()
File "/usr/share/indicator-kdeconnect/Sms.py", line 150, in get_connections
response = google.get(people_api, params=params_paging).json()
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 533, in get
return self.request('GET', url, **kwargs)
File "/usr/lib/python3/dist-packages/requests_oauthlib/oauth2_session.py", line 330, in request
http_method=method, body=data, headers=headers)
File "/usr/lib/python3/dist-packages/oauthlib/oauth2/rfc6749/clients/base.py", line 193, in add_token
raise TokenExpiredError()
oauthlib.oauth2.rfc6749.errors.TokenExpiredError: (token_expired)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/lib/python3.6/threading.py", line 916, in _bootstrap_inner
self.run()
File "/usr/lib/python3.6/threading.py", line 864, in run
self._target(*self._args, **self._kwargs)
File "/usr/share/indicator-kdeconnect/Sms.py", line 169, in get_contacts
self.refresh_token()
File "/usr/share/indicator-kdeconnect/Sms.py", line 134, in refresh_token
client_secret=self.client_secret)
File "/usr/lib/python3/dist-packages/requests_oauthlib/oauth2_session.py", line 309, in refresh_token
self.token = self._client.parse_request_body_response(r.text, scope=self.scope)
File "/usr/lib/python3/dist-packages/oauthlib/oauth2/rfc6749/clients/base.py", line 408, in parse_request_body_response
self.token = parse_token_response(body, scope=scope)
File "/usr/lib/python3/dist-packages/oauthlib/oauth2/rfc6749/parameters.py", line 379, in parse_token_response
validate_token_parameters(params)
File "/usr/lib/python3/dist-packages/oauthlib/oauth2/rfc6749/parameters.py", line 386, in validate_token_parameters
raise_from_error(params.get('error'), params)
File "/usr/lib/python3/dist-packages/oauthlib/oauth2/rfc6749/errors.py", line 415, in raise_from_error
raise cls(**kwargs)
oauthlib.oauth2.rfc6749.errors.InvalidGrantError: (invalid_grant) Token has been expired or revoked.