title: ASP.NET Core Web API Skip Authentication
body: <p>I'm writing an ASP.NET Core web application using a custom basic authentication, based on the following example: 
  <a href="https://stackoverflow.com/questions/38977088/asp-net-core-web-api-authentication">ASP.NET Core Web API Authentication</a>
  Now I have an action in my user controller in order to register user. So I would like to pass this method my custom Attribute "SkipAuthAttribute" in order to say, if someone calls this method (action) you have to skip the authenticaion (the user which want to register, has no login).</p>
  
  <p>But the type HttpContext has no ActionDescriptor to get the Custom Attributes of the action </p>
  
  <p>Knows someone, how can I skip the authenticaion by some specific actions?</p>