How to add OnTokenValidated event handler when using AD B2C?

Question

I am using Azure B2C in a ASP.NET Core 3 application, which is working perfectly. I use the following code in Startup:

services.AddAuthentication(AzureADB2CDefa         


        

Answer 1

I found my answer, by searching for ["Events.OnTokenValidated" AzureAdB2C] in github, and assembled the following for my case:

// My existing code in Startup:
services.AddAuthentication(AzureADB2CDefaults.AuthenticationScheme)
        .AddAzureADB2C(options => Configuration.Bind("AzureAdB2C", options));

// My added code to handle the OnTokenValidated event
services.Configure<OpenIdConnectOptions>(AzureADB2CDefaults.OpenIdScheme, options =>
{
    var onTokenValidated = options.Events.OnTokenValidated;
    options.Events.OnTokenValidated = context =>
    {
        onTokenValidated?.Invoke(context);
        // My custom handler goes below: