MongoDB status failed after editing mongo.conf (code-exited, status=2) - mongodb

Question

I'm trying to connect remotely to my Google Cloud Server with Robo 3T to connect too MongoDB v4.0.11 just so I can see the data from windows.
I am running Ubuntu 18.04LTS Minimal. To enable remote connections to MongoDB I have first created both an administrative and root user in my admin database.
My problem is once I add authorization: "enabled" to security: in /etc/mongod.conf and restart MongoDB, I get the following status when running $:systemctl status mongod
● mongod.service - MongoDB Database Server
Loaded: loaded (/lib/systemd/system/mongod.service; disabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Tue 2019-08-06 16:43:51 BST; 1min 20s ago
Docs: https://docs.mongodb.org/manual
Process: 6517 ExecStart=/usr/bin/mongod --config /etc/mongod.conf (code=exited, status=2)
Main PID: 6517 (code=exited, status=2)
Aug 06 16:43:51 instance-1 systemd[1]: Started MongoDB Database Server.
Aug 06 16:43:51 instance-1 mongod[6517]: Unrecognized option: processManagement.authorization
Aug 06 16:43:51 instance-1 mongod[6517]: try '/usr/bin/mongod --help' for more information
Aug 06 16:43:51 instance-1 systemd[1]: mongod.service: Main process exited, code=exited, status=2/INVALIDARGUMENT
Aug 06 16:43:51 instance-1 systemd[1]: mongod.service: Failed with result 'exit-code'.
Example of /etc/mongod.conf
# mongod.conf
# for documentation of all options, see:
# http://docs.mongodb.org/manual/reference/configuration-options/
# Where and how to store data.
storage:
dbPath: /var/lib/mongodb
journal:
enabled: true
# engine:
# mmapv1:
# wiredTiger:
# where to write logging data.
systemLog:
destination: file
logAppend: true
path: /var/log/mongodb/mongod.log
# network interfaces
net:
port: 27017
bindIp: 127.0.0.1
# how the process runs
processManagement:
timeZoneInfo: /usr/share/zoneinfo
#security:
authorization: "enabled"
#operationProfiling:
#replication:
#sharding:
## Enterprise-Only Options:
#auditLog:
#snmp:
It appears there is an invalid argument in /etc/mongod.conf but from what I have read online I can't see the problem.

Answer 1

wrong:
#security:
authorization: "enabled"
correct:
security:
authorization: enabled

Answer 2

For the 4.x release it appears you need to modify the existing security section you have listed
#security:
authorization: "enabled"
And replace it with security.authorization: enabled or
security:
authorization: "enabled"
You should then be able to reload and test authentication is working as expected.
If you dig into the docs you will find the relevant section here.
security.authorization
Type: string
Default: disabled
Enable or disable Role-Based Access Control (RBAC) to govern each user’s access to database resources and operations.
Set this option to one of the following:
Value Description
enabled A user can access only the database resources and actions for which they have been granted privileges.
disabled A user can access any database and perform any action.

Answer 3

In my case the problem was that I used a tab to indent the authorization: enabled line. When I replaced the tab with 2 spaces it worked.