I want to test kubernetes for gitlab-ci, so I want to create my first k8s cluster on aws

So I follow the docs:

sudo snap install conjure-up --classic
# re-login may be required at that point if you just installed snap utility
conjure-up kubernetes

In the install process, I choose:

• Canonical Distribution of Kubernetes
• Helm
• AWS
• my credentials
• us-east-2
• Juju-as-a-Service (JaaS) Free Controller

Then I must log into JaaS. I log entering my Ubuntu One account, but it always fail:

 Login failed, please try again: ERROR cannot log into "jimm.jujucharms.com": cannot get user details for "https://login.ubuntu.com/+id/W8KzXrQ":
                  not found  

What am I forgetting ?