use admin
db.createUser(
    { user : "root", pwd : "ilovedb#u2game", roles : ["root"] }
)

use dbmaccount
db.createUser(
    {user: "mmog", pwd: "mmog", roles: [ { role: "readWrite", db: "dbmaccount" } ]}
)

use dbmgame
db.createUser(
    {user: "mmog", pwd: "mmog", roles: [ { role: "readWrite", db: "dbmgame" } ]}
)