UserManager VerifyUserTokenAsync Always False

I finally figured this after pulling my hair out for hours. You need to URL encode the code and I decided to use the HttpUtility class for this.

HttpUtility.UrlEncode(code);

When it comes to verifying the code, you do not need to URL decode the code.

Having just burned 2 days on this issue, here is another reason this might be happening to you.

In your Startup.cs - ConfigureServices(IServiceCollection services) method, ensure that:

services.AddAuthentication

Appears BEFORE

services.AddIdentity

Otherwise calls to VerifyUserTokenAsync will always return false