Reading
- ASP.NET Core OpenIdConnect: Why is the ClaimsPrincipal name NULL? by Iris Classon
- CREATING PDF FILES IN ASP.NET CORE by damien bod
- [The danger of TaskCompletionSource
class](https://blogs.msdn.microsoft.com/seteplia/2018/10/01/the-danger-of-taskcompletionsourcet-class/) by Sergey Teplyakov - Using Async with ManualResetEventSlim by Calvin H