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All identity providers are flexible and allow you to add custom claims in the issued access token. IdentityServer4 is no different in this scenario. Here is a short manual how to add custom claims in IdentityServer4 access token response.

You need to implement a ProfileService:

public class ProfileService : IProfileService
{
	public ProfileService(
		UserManager<PafUseruserManager)
	{
		_userManager = userManager;
	}

	public async Task GetProfileDataAsync(ProfileDataRequestContext context)
	{
		var user = await _userManager.GetUserAsync(context.Subject);

		var claims = new List<Claim{
			new Claim("custom_claim1", user.CustomClaim1),
			

You need sometimes IdentityServer 4 to interact with other services and to need information from them. And in many cases the same instance of the IdentityServer is the one that authorizes the access to those other services. Wee need to issue an access token to our-self in order to get/post the necessary information.

In my case I needed to create a corresponding object in another service on new user registration. To get the access token needed I have used IdentityServerTooks …