When creating first admin user on mongdb cluster getting error “couldn't add user: not authorized on admin to execute command”

Question

I am using mongoDB Cluster with version 3.4 in google cloud compute engine, actually past week my database got attacked by hackers that\'s why i thought about using authorizatio

Answer 1

edit vim /lib/systemd/system/mongod.service

remove --auth 
restart

#ExecStart=/usr/bin/mongod --quiet --auth   --config /etc/mongod.conf
ExecStart=/usr/bin/mongod --quiet  --config /etc/mongod.conf
use admin
db.createUser({user:"RootAdmin",pwd:"blahblah",roles:["root"]})