Under Example value column select the row you want to add an example value and it will be added to your API documentation.
You are seeing authentication information is missing or invalid probably because you didn't implement an authentication method.
Select requires authentication in your message definition and specify your authentication method.
Here is how I did it:
-Created a User role for the API in your application and call it on startup.
-Customized APIAuthentication MF from OIDC module.
Check below screenshot for messsage definition options.
This is the section I was referring
Hi,
Did you use some example values in your JSON which you are using for Message Definition?