API.verify_credentials() throws Error instead of returning False if consumer_key is set to None #1489

Traceback (most recent call last):
  File "/home/ven/.local/lib/python3.8/site-packages/tweepy/binder.py", line 184, in execute
    resp = self.session.request(self.method,
  File "/usr/lib/python3/dist-packages/requests/sessions.py", line 519, in request
    prep = self.prepare_request(req)
  File "/usr/lib/python3/dist-packages/requests/sessions.py", line 452, in prepare_request
    p.prepare(
  File "/usr/lib/python3/dist-packages/requests/models.py", line 317, in prepare
    self.prepare_auth(auth, url)
  File "/usr/lib/python3/dist-packages/requests/models.py", line 548, in prepare_auth
    r = auth(self)
  File "/home/ven/.local/lib/python3.8/site-packages/requests_oauthlib/oauth1_auth.py", line 108, in __call__
    r.url, headers, _ = self.client.sign(
  File "/usr/lib/python3/dist-packages/oauthlib/oauth1/rfc5849/__init__.py", line 313, in sign
    ('oauth_signature', self.get_oauth_signature(request)))
  File "/usr/lib/python3/dist-packages/oauthlib/oauth1/rfc5849/__init__.py", line 127, in get_oauth_signature
    uri, headers, body = self._render(request)
  File "/usr/lib/python3/dist-packages/oauthlib/oauth1/rfc5849/__init__.py", line 209, in _render
    headers = parameters.prepare_headers(
  File "/usr/lib/python3/dist-packages/oauthlib/oauth1/rfc5849/utils.py", line 32, in wrapper
    return target(params, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/oauthlib/oauth1/rfc5849/parameters.py", line 59, in prepare_headers
    escaped_value = utils.escape(value)
  File "/usr/lib/python3/dist-packages/oauthlib/oauth1/rfc5849/utils.py", line 56, in escape
    raise ValueError('Only unicode objects are escapable. ' +
ValueError: Only unicode objects are escapable. Got None of type <class 'NoneType'>.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "test.py", line 7, in <module>
    api.verify_credentials()
  File "/home/ven/.local/lib/python3.8/site-packages/tweepy/api.py", line 662, in verify_credentials
    return bind_api(
  File "/home/ven/.local/lib/python3.8/site-packages/tweepy/binder.py", line 252, in _call
    return method.execute()
  File "/home/ven/.local/lib/python3.8/site-packages/tweepy/binder.py", line 192, in execute
    six.reraise(TweepError, TweepError('Failed to send request: %s' % e), sys.exc_info()[2])
  File "/usr/lib/python3/dist-packages/six.py", line 702, in reraise
    raise value.with_traceback(tb)
  File "/home/ven/.local/lib/python3.8/site-packages/tweepy/binder.py", line 184, in execute
    resp = self.session.request(self.method,
  File "/usr/lib/python3/dist-packages/requests/sessions.py", line 519, in request
    prep = self.prepare_request(req)
  File "/usr/lib/python3/dist-packages/requests/sessions.py", line 452, in prepare_request
    p.prepare(
  File "/usr/lib/python3/dist-packages/requests/models.py", line 317, in prepare
    self.prepare_auth(auth, url)
  File "/usr/lib/python3/dist-packages/requests/models.py", line 548, in prepare_auth
    r = auth(self)
  File "/home/ven/.local/lib/python3.8/site-packages/requests_oauthlib/oauth1_auth.py", line 108, in __call__`
    r.url, headers, _ = self.client.sign(
  File "/usr/lib/python3/dist-packages/oauthlib/oauth1/rfc5849/__init__.py", line 313, in sign
    ('oauth_signature', self.get_oauth_signature(request)))
  File "/usr/lib/python3/dist-packages/oauthlib/oauth1/rfc5849/__init__.py", line 127, in get_oauth_signature
    uri, headers, body = self._render(request)
  File "/usr/lib/python3/dist-packages/oauthlib/oauth1/rfc5849/__init__.py", line 209, in _render
    headers = parameters.prepare_headers(
  File "/usr/lib/python3/dist-packages/oauthlib/oauth1/rfc5849/utils.py", line 32, in wrapper
    return target(params, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/oauthlib/oauth1/rfc5849/parameters.py", line 59, in prepare_headers
    escaped_value = utils.escape(value)
  File "/usr/lib/python3/dist-packages/oauthlib/oauth1/rfc5849/utils.py", line 56, in escape
    raise ValueError('Only unicode objects are escapable. ' +
tweepy.error.TweepError: Failed to send request: Only unicode objects are escapable. Got None of type <class 'NoneType'>.