I am trying to build a web app using scalatra, and am working on the authentication. I successfully used scentry with an userpassword strategy. However, to do that, I had to "await" on my database requests: some of the scentry methods (authenticate, fromSession) expect a non-future return type . Is there a way to do async authentication in scalatra?
No. As you correctly noticed, the validate method doesn't return a future in its signature, so we have to await.
The rational behind this is that you need to know "right now" if the user is authenticated, before you start doing other calculations or operations.