Add onboarding and FromRequest for User.

src/routes/onboard/mod.rs

@@ -1,9 +1,11 @@
 use rocket::Route;
 
 mod hello;
+mod complete;
 
 pub fn routes() -> Vec<Route> {
     routes! [
-        hello::req
+        hello::req,
+        complete::req
     ]
 }