Update Claims after Authentication

Hello,

This is not necessarily and EpiServer issue but am trying to find a solution to this and was thinking if any of us might have ran in this issue.

My site uses multiple authentication schemes (CookieAuthentication for Web and JwtBearerAuthentication for Content Delivery API). For some reason I have to add custom claims after the token validation is complete and couldn't find a way to do it. This is classic MVC site with framework 4.7.2. I saw something like this can be done in asp.net core but if anyone has ran into such scenarios would like to hear any inputs.

Below is the sample code for token validation.

        app.UseJwtBearerAuthentication(
            new JwtBearerAuthenticationOptions
            {
                TokenHandler = new ValidateJwtSecurityTokenHandlerforLogs(_loggingService, _environment),
                AuthenticationMode = AuthenticationMode.Active,
                TokenValidationParameters = new TokenValidationParameters()
                {
                    NameClaimType = JwtClaimTypes.Name, 
                    RoleClaimType = OpenIDConfiguration.Permission, 
                    ValidateAudience = false, 
                    ValidIssuer = authority,
                    IssuerSigningKeyResolver = (token, securityToken, identifier, parameters) =>
                    {
                        var discoveryDocument = Task.Run(() => configurationManager.GetConfigurationAsync()).GetAwaiter().GetResult();
                        return discoveryDocument.SigningKeys;
                    }
                }
            });