Ionic-cli: Unable to Login

[ccravens]

Description:
When trying to login with ionic-cli, I get the following error:

[ERROR] API request was successful, but the response format was unrecognized.

        Request: POST https://api.ionic.io/login
        Response: 200
        Body: 
        { user_id: '123456',
           token: 
        'xxxxxxxxxxxxxxxxxxxxxxxx.xxxxxxxxxxxxxxxxxxxxxxxxxxxx.xxxxxxxxxxxxxxxxxxxx' 
        }

Steps to Reproduce:
1) Run "ionic login"
2) Login with valid credentials

Output:

My ionic info:
[WARN] You are not in an Ionic project directory. Project context may be missing.

cli packages: (/usr/local/lib/node_modules)

@ionic/cli-utils  : 1.10.2
ionic (Ionic CLI) : 3.10.3

System:

Node : v8.4.0
npm  : 5.4.1 
OS   : macOS Sierra

Other Information:
I created an account a long time ago, maybe an incompatibility?

[janpio]

Can you login on https://dashboard.ionicjs.com/ or https://apps.ionic.io with your credentials?

[xuanphucmanagement]

use this command
"ionic config set -g backend legacy"
"ionic login"

[ccravens]

@xuanphucmanagement thanks! That worked!

Should this issue be left open so that this step is no longer required in future realeses or close it out?

[janpio]

I think you can close it, as this should go away over time by default - more people will have a new account, and in January '18 old accounts will go away completely. Also there is no way to "fix" this for all people right now - either for people with new accounts or people with old accounts login will fail in either backend mode.