Updating createMovieHandler using helper's readJSON method.

cmd/api/helpers.go

@@ -86,7 +86,7 @@ func (app *application) writeJSON(w http.ResponseWriter, status int, data envelo
 }
 
 func (app *application) readJSON(w http.ResponseWriter, r *http.Request, dst any) error {
-	// Decode the request body into the target destination.
+	// Initialize a new json.Decoder instance which reads from the request body, and then use the Decode() method to decode the body contents into the input struct.
 	err := json.NewDecoder(r.Body).Decode(dst)
 	if err != nil {
 		// If there is an error during decoding, start the triage...