Major - P3 On mongod:
> db.createUser({user: 'bob', pwd: 'pwd', roles: ['fakeRole']});
2013-12-13T16:31:57.329-0500 Error: couldn't add user: No role named fakeRole@test at src/mongo/shell/db.js:1016
On mongos:
> db.createUser({user:'bob', pwd: 'pwd', roles:['fakeRole']})
2013-12-13T16:30:35.561-0500 Error: couldn't add user: invalid parameter: expected an object () at src/mongo/shell/db.js:1016