ionic-cli: Cannot login with ionic upload

When I do ionic upload, and login with my user/pass, I get the following error message:

$ ionic upload
No previous login existed. Attempting to log in now.

To continue, please login to your Ionic account.
Don't have one? Create a one at: https://apps.ionic.io/signup

Email: [redacted]
Password: 
Error logging in



Email or Password incorrect. Please visit https://apps.ionic.io for help. (CLI v1.5.5)

Your system information:

Cordova CLI: 5.1.1
Ionic Version: 1.0.0
Ionic CLI Version: 1.5.5
Ionic App Lib Version: 0.2.2
ios-deploy version: Not installed
ios-sim version: Not installed
OS: Mac OS X Yosemite
Node Version: v0.10.39
Xcode version: Xcode 6.3.2 Build version 6D2105 

However I am able to log on to the web interface with the same email and password.

I read the guide at http://ionicframework.com/docs/cli/uploading_viewing.html and it says

You will be prompted for your username and password (the one you received when you signed up). Once this is done, your app will be uploaded to us.

But I did not receive a password when I signed up!

I have tried resetting my password and un/re- installing ionic, as well as logging in from older versions of the Ionic CLI. However, none have been successful.