Thanks found that

ACP page ?

i have hosted nodebb on my private server and i want remove new topic from user
i want user to post inside of given categories only and user should not be able to add any new topic
only admin can add use
can we do something like this ?

nodebb is already running but when i try to run nodebb restart after editing config file it says no nodebb is running

@PitaJ @administrators @Staff still facing this error
here is config file {

"url":"http://35.154.149.215:4567",
"secret": "58bd794a-29a1-4432-8c18-d416403645e7",
"database": "mongo",
"mongo": {
    "host": "127.0.0.1",
    "port": "27017",
    "username": "admin",
    "password": "admin",
    "database": "admin",
    "uri": ""
},
"port": "4567"

}

@PitaJ
{
""url": "http://localhost:4567",
"secret": "58bd794a-29a1-4432-8c18-d416403645e7",
"database": "mongo",
"mongo": {
"host": "127.0.0.1",
"port": "27017",
"username": "admin",
"password": "admin",
"database": "admin",
"uri": ""
},
"port": "4567"
}
here is my config file

recently I have installed nodebb on aws ubuntu server
installation works fine but it is throwing sockets error

anyone knws how to solve this ?