Authorization has been denied for this request - New Web API Project

Question

I just created new Web API project (using MVC) in visual studio 2015 and for the testing purpose, I ran that project but ended up below error.

After running the project,

Answer 1

I got the answer here.

https://stackoverflow.com/a/29405794/8107314

And it was very useful to fix my error my error

I just came across the same problem and found the solution:

You need to register the OAuth Token Generator and OAuth Token Consumer things before WebAPI is registered.

Kind of makes sense if you think of this as a pipeline, where Authentication/Authorization should come before any request handling by the controllers.

TL;DR: Change

appBuilder.UseWebApi(config);

this.ConfigureOAuthTokenGenerator(appBuilder);
this.ConfigureOAuthConsumer(appBuilder);

To

this.ConfigureOAuthTokenGenerator(appBuilder);
this.ConfigureOAuthConsumer(appBuilder);

appBuilder.UseWebApi(config);