Can finalize Matrix authentication

matrixgw_frontend/src/routes/MatrixLinkRoute.tsx

@@ -79,9 +79,17 @@ function ConnectedCard(): React.ReactElement {
 
         <Typography variant="body1" gutterBottom>
           <p>
-            MatrixGW is currently connected to your account with ID{" "}
-            <i>{user.info.matrix_user_id}</i>.
+            MatrixGW is currently connected to your account with the following
+            information:
           </p>
+          <ul>
+            <li>
+              User id: <i>{user.info.matrix_user_id}</i>
+            </li>
+            <li>
+              Device id: <i>{user.info.matrix_device_id}</i>
+            </li>
+          </ul>
           <p>
             If you encounter issues with your Matrix account you can try to
             disconnect and connect back again.