adding custom claims to identity server 4 GrantValidationResult

Question

As per http://docs.identityserver.io/en/release/reference/grant_validation_result.html I'm trying to add extra claims to a GrantValidationResult but the extra claims arent showing up just wondering where i could be going wrong here:

var extraClaims = new List<Claim> {
new Claim("resource_id", resourceId) 
};
context.Result = new GrantValidationResult(
subject: bobIdentity,
authenticationMethod: "custom", 
claims: extraClaims); 
return;

Answer 1

If you haven't setup your own custom Extension Grant check out this information:

http://docs.identityserver.io/en/release/topics/extension_grants.html?highlight=GrantValidationResult

You need to create custom IExtensionGrantValidator implementation to add extra claims.

Simple example is also located at that link.