With some help from Dan Ahmadi from Meteor, I solved it (thanks Dan!). The answer to this question is for those who have the same problem.
Turns out I confused the Galaxy subdomain with the Meteor Developer account. I did not need to create a developer account for the meteor, since I already had one (it had to be created during the free deployment of the hosting), and therefore I was still logged into it.
To solve this problem:
$ meteor whoami oldusername $ meteor logout Logged out. $ meteor login Username: appname Password: Logged in as appname. Thanks for being a Meteor developer! $ DEPLOY_HOSTNAME=galaxy.meteor.com meteor deploy appname.meteorapp.com --settings ./settings.json Deploying to appname.meteorapp.com. Now serving at http://appname.meteorapp.com
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