ASP.NET .NET 6 OIDC Retrieve JWT AccessToken after SaveTokens

I was not able to find the docs for retrieving the JWT AccessToken in ASP.NET .NET 6 after they are saved so I decided to document it here.

You may be familiar with the HttpContext.GetTokenAsync() method. This appears to have worked in previous version of .NET, but I could not get it to work in .NET 6.

First, make sure you are saving the access tokens in the AddOpenIdConnect configuration.

builder
    .Services
    .AddAuthentication(options =>
    {
        options.DefaultScheme = CookieAuthenticationDefaults.AuthenticationScheme;
        options.DefaultChallengeScheme = OpenIdConnectDefaults.AuthenticationScheme;
    })
    .AddCookie()
    .AddOpenIdConnect(options =>
    {
        options.SaveTokens = true;
    });

Then, instead of HttpContext.GetTokenAsync(), call HttpContext.AuthenticateAsync(), and get the token out of the AuthenticateResult.

var accessToken = authenticateResult?.Properties?.GetString(".Token.access_token");


Hope this helps,
Aaron


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