As you know by http://x.x.x.x/usersignup page users can edit and change privilage information and their password!
i am going to edit and customize this html page! (sign up.html)
but i cant find this file in files list of router! 
my os is 5.11.help me please…some say it is possible just in 4.x os! is it right?!
i am waiting your answer friends!! 
Perhaps you should wait until 5.12 is released before asking about this.
are you sure that function they will include in 5.12?