code: func (c *controllerAPI) GetSink(ctx context.Context, w http.ResponseWriter, req *http.Request) {
  	params, _ := ctxhelper.ParamsFromContext(ctx)
  
  	sink, err := c.sinkRepo.Get(params.ByName("sink_id"))
  	if err != nil {
  		respondWithError(w, err)
  		return
  	}
  
  	httphelper.JSON(w, 200, sink)
  }
docs: // Get a sink