This topic is used to search devices which belongs to user. To use it, in this topic should be sent sha256 hash of UID. All devices which have this user will answers with their MAC
example:
[1698916319] >48:3f:da:55:07:5b/3996365522/user/add "J8GTl7SsleUnuPB7dDFeuC8H9p0DqRakOESA2TMzPdt87U7HJ6xID8J+Pl1Yor/PRyw5Sg9xDF9ssU76TnMeSdU6CAUEj513Bn7xmNXaPaW9fd+mhgp2UthablkMIRPr7QGz0Lw+YXRLzpJmVpisNg==.6KMI62AT1YzWAQ4SWOxESxwfDhoAm1+JBIBvU
Qsvuco="
[1698916319] <48:3f:da:55:07:5b/3996365522/user/add "hdMU2nT5by40zEY21b1Ufg==.F1SYOOcOwzmUSeNJDfOJjHHt6JMjw/o3mwEREqPbwWE="
----
[1698916320] >user/dev yt2q8P3UwdnRsQHRD9VS9TKrGx0aaSfbDOXC7m1xjHY=
[1698916320] <user/dev 48:3f:da:55:07:5b/3996365522