Improved error messagees, implemented delete ciphers, attachments and account, implemented two factor recovery.

Known missing:
 - import ciphers, create ciphers types other than login and card, update ciphers
 - clear and put device_tokens
 - Equivalent domains
 - Organizations

src/db/models/device.rs

@@ -113,4 +113,10 @@ impl Device {
             .filter(devices::refresh_token.eq(refresh_token))
             .first::<Self>(&**conn).ok()
     }
+
+    pub fn find_by_user(user_uuid: &str, conn: &DbConn) -> Vec<Self> {
+        devices::table
+            .filter(devices::user_uuid.eq(user_uuid))
+            .load::<Self>(&**conn).expect("Error loading devices")
+    }
 }