Add verification callback

handler/app.py

@@ -77,6 +77,12 @@ class WebApp(util.Base):
         # self.sinks.truelayer.handle_authcode_received(code)
         return dumps(True)
 
+    @app.route("/callback-verify", methods=["POST"])
+    def callback_verify(self, request):
+        # code = request.args[b"code"]
+        rtrn = self.ux.verify.handle_callback(request)
+        return dumps(rtrn)
+
     @app.route("/accounts/<string:account>", methods=["GET"])
     def balance(self, request, account):
         accounts = self.sinks.truelayer.get_accounts(account)