code: def whoami(self):
          
          endpoint = '/ping/whoami'
          response = self._get_response(
              method='get', endpoint=endpoint,
          )
  
          return response.json()
docs: Get information about the access token.
  
          Official docs:
              https://monzo.com/docs/#authenticating-requests
  
          :returns: access token details
          :rtype: dict