code: def get_user_info(self):
          
          response = self._session.get(BASE_URL_TSQUARE + '/user/current.json')
          response.raise_for_status() # raises an exception if not 200: OK
          user_data = response.json()
          del user_data['password'] # tsquare doesn't store passwords
          return TSquareUser(**user_data)
docs: Returns a TSquareUser object representing the currently logged in user.
          Throws a NotAuthenticatedException if the user is not authenticated.