Doesn't seem to work with .NET Core 3.1

[pkunze]

I tried to include this in a project based on dotnet core 3.1
It doesn't throw any errors, but I am not able to select stuntman users either.
It remains in "Anonymous".

I have attached a sample project which reproduces the issue.

Please let me know if I can do anything more to resolve this.
If someone pointed me in the right direction I'd gladly try to solve this myself and submit a PR.

StuntmanTest.zip

[kendaleiv]

.NET Core 3.1 currently isn't supported (at least, not in any intentional fashion). I think we'd want to add netcoreapp3.0 to TargetFrameworks and make any changes necessary for that version (assuming this will enable both .NET Core 3.0 and .NET Core 3.1 to work).

[pkunze]

Alright, i try to make this work. I forked the project and added the target framework as you suggested.
I narrowed the problem down to context.SignInAsync not setting the User/Identity when there is another AuthMiddleware (Cookies) registered. (Sorry if this is phrased in a confusing way, I am not a native speaker and have no clue of Authentication whatsoever ;))

So basically, when using it in a blank .NET Core 3 Project without Authentication it works.
If I use it in a Project I created using the "Individual User Accounts) Auth-Option it doesn't.

I have no clue why and so far, I didn't manage to find the solution using my favorite Search Engines.
So my question is: Would it be of any help if i create a PR with my WIP or does anybody has an idea whats going on/wrong?

[pkunze]

Maybe related to #179, I got it to work with 3.1 using the workaround mentioned there.