Please, post some Router.js code examples that works!

It’s logical operator. You can learn about them here

It’s one of the basics, so if you are really interested in programming i recommend you to check this topic.
In my code if (query.items.length) returns true when array is not empty, and if (!query.items.length) returns true when it is empty.

BIG (Y) I know the boolean operator, of course, but I didn’t get it in this way, now it’s really logic. Thx so much.

Andrii unfortunely it’s working always at half. All works BUT the response on r-page is always “no user found” . IR-page is not able to show the message: ‘Email confirmed’