code: def create(self, alpha_sender):
          
          data = values.of({'AlphaSender': alpha_sender, })
  
          payload = self._version.create(
              'POST',
              self._uri,
              data=data,
          )
  
          return AlphaSenderInstance(self._version, payload, service_sid=self._solution['service_sid'], )
docs: Create a new AlphaSenderInstance
  
          :param unicode alpha_sender: An Alphanumeric Sender ID string, up to 11 characters.
  
          :returns: Newly created AlphaSenderInstance
          :rtype: twilio.rest.messaging.v1.service.alpha_sender.AlphaSenderInstance