code: func (call *GetMessageQuotaCall) Do() (*MessageQuotaResponse, error) {
  	res, err := call.c.get(call.ctx, APIEndpointGetMessageQuota, nil)
  	if err != nil {
  		return nil, err
  	}
  	defer closeResponse(res)
  	return decodeToMessageQuotaResponse(res)
  }
docs: // Do method