Creating badRequestResponse helper method inside errors.go and use in in the createMovieHandler.

cmd/api/errors.go

@@ -21,6 +21,7 @@ func (app *application) errorResponse(w http.ResponseWriter, r *http.Request, st
 
 	// Write the response using the writeJSON() helper. If this happens to return an error then og it, and fall back to sending the client an empty response with a 500 Internal Server Error status code.
 	err := app.writeJSON(w, status, env, nil)
+
 	if err != nil {
 		app.logError(r, err)
 		w.WriteHeader(500)
@@ -46,3 +47,7 @@ func (app *application) methodNotAllowedResponse(w http.ResponseWriter, r *http.
 	message := fmt.Sprintf("the %s method is not supported for this resource", r.Method)
 	app.errorResponse(w, r, http.StatusMethodNotAllowed, message)
 }
+
+func (app *application) badRequestResponse(w http.ResponseWriter, r *http.Request, err error) {
+	app.errorResponse(w, r, http.StatusBadRequest, err.Error())
+}