HttpClient PostAsync() never return response

Question

My problem is very similar to this question here. I have an AuthenticationService class that makes an HttpClient PostAsync() and never

Answer 1

Since you are using .Result, this will end up causing a deadlock in your code. The reason this is working in a console application is because console applications don't have contexts, but ASP.NET apps do (see Stephen Cleary's Don't Block on Async Code). You should make the Signin method in your controller async and await the call to _authenticationService.Authenticate to resolve the deadlock issue.