Unable to access the deployed meteor mongodb database

Question

I deployed the site on a meteor and I had problems accessing the database from my command line. I keep getting the error:

Error: 18 { ok: 0.0, errmsg: "auth failed", code: 18 } at src/mongo/shell/db.js:1210 exception: login failed

The steps I took:

meteor login

Enter meteor username and pw

meteor mongo myappname.meteor.com

I get an error message:

Error: 18 { ok: 0.0, errmsg: "auth failed", code: 18 } at src/mongo/shell/db.js:1210 exception: login failed

Can anyone help?

Thanks in advance!