By default, mongo runs with user auth disabled.
To enable it, do the following:
Create admin user
First, connect to admin database and create "admin" user (it can be named anything, does not necessarily need to be called "admin"):
Enable user auth in mongod.conf and restart mongod
In /etc/mongod.conf, make sure the following is present and restart mongod:
Connect to mongo shell with auth enabled
Create a non-admin user for database access
This one will create "phpunituser" with "readWrite" access to "phpunitdb" database. Make sure "use phpunitdb" is present before db.createUser(...):
Connect to mongo shell as non-admin user
