code: def _connect(self):
          
          oauth_client = BackendApplicationClient(client_id=self.client_id)
          oauth_session = OAuth2Session(client=oauth_client)
          token = oauth_session.fetch_token(token_url=self.url + "oauth/token",
                                              client_id=self.client_id,
                                              client_secret=self.client_secret)
                                              #verify=False)
          return OAuth2Session(client_id=self.client_id,
                                      token=token)
docs: Retrieve token from USMA API and create an authenticated session
          :returns OAuth2Session: authenticated client session