Run code after openid connect sign-in in Asp.net Core

Question

I am trying to figure out the best way to run some code once a user has authenticated themselves using OpenID Connect on a Dotnet Core MVC App. I don't want to hard code a redirect URL after sign-in because they still need to end up where they were trying to get to after authentication. I just need to run code eg. "check if its the first time sign-in and set a flag" or something similar.

I was using a middle-ware but since this gets called for every request its causing some problems.

Does anyone have any ideas on how to achieve this?

Answer 1

I am using OpenIdConnect events to solve this problem.

.AddOpenIdConnect("oidc", options =>
{
   options.Events = new OpenIdConnectEvents
   {
       OnTokenValidated = async ctx =>
       {
           var userID = ctx.Principal.FindFirstValue("sub");

           var db = ctx.HttpContext.RequestServices.GetRequiredService<MyDb>();

           //Do things I need to do with the user here.

       }
   }
}