userid associated with username

[StarRyder]

userid associated with username

i need to know how to give my self special admin rigth in other other word my usrname is Joxxx = where or how i find my userid ??
please this all i need thx

so i can edit my config.php

// ****** SUPER ADMINISTRATORS ******

// The users specified below will have permission to access the administrator permissions

// page, which controls the permissions of other administrators

$config['SpecialUsers']['superadministrators'] = 24; <<< wrong userid

thx for all