code: def get_signed_in_token(self):
          
          response = self._send(http_method='GET',
                                location_id='6074ff18-aaad-4abb-a41e-5c75f6178057',
                                version='5.0-preview.1')
          return self._deserialize('AccessTokenResult', response)
docs: GetSignedInToken.
          [Preview API]
          :rtype: :class:`<AccessTokenResult> <azure.devops.v5_0.identity.models.AccessTokenResult>`