Fix 186

[converge]

- What I did

As reported on #186, user token deletion is failing to delete user access tokens. The issue is caused by the missing username at the hubClient.AuthConfig.Username struct field, the confirmation step looks for the username to confirm, but the username information is empty/not set.

- How I did it

At initialization, the auth, err := store.GetAuth() is called, I got it in advance, and provided the authorization data to the struct.

- How to verify it

1. create a new user token via hub-tool token create
2. delete the user token via hub-tool token rm uuid-token
3. the confirmation step will now show the username, and the username can be confirmed.

- Description for the changelog

Fix user token deletion by adding missing authorization data to the hubClient.

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