No, all the users must have the request if they want to have notifications.
Maybe I can create a new table, copy all the notification_request to that new table, delete all the notification_requests, and copy from the new table to notification_request the user I want to have the notification, create the notification, and then, copy from the new table to the notification_request all the requests.
Maybe it'll work, but there will be too many movement in the DB.
If anyone has another idea...
