Creating the first application user

Not sure where I went wrong here, it feels like everything is correct but I am failing all of the tests …

 db.createUser({user:"m103-application-user", pwd: "m103-application-pass", 
... roles: [{role:"readWrite", db: "applicationData"}]})

Successfully added user: {
        "user" : "m103-application-user",
        "roles" : [
                {
                        "role" : "readWrite",
                        "db" : "applicationData"
                }
        ]
}

Any guidance would be appreciated

got it to work. thanks