snap login fails silently if already logged in

[Ricardo Kirkner]

How to reproduce:

$ sudo snap login <email address hidden>
<enter password>

$ cat ~/.snap/auth.json
{..."email": "<email address hidden>"...}

$ sudo snap login <email address hidden>
<enter password>

$ cat ~/.snap/auth.json
{..."email": "<email address hidden>"...}

However if you first log out

$ sudo snap logout

$ cat ~/.snap/auth.json
cat: ~/.snap/auth.json: No such file or directory

$ sudo snap login <email address hidden>
<enter password>

$ cat ~/.snap/auth.json
{..."email": "<email address hidden>"...}

Expected result:

Whenever snap login completes successfully, the auth.json file should be updated to reflect the latest credentials used.

Having a snap whoami command (or similar) would help a lot to show which account is currently logged in.

[Zygmunt Krynicki (zyga)]

I just tested this on 2.27.2 and:

- snap login can be invoked many times, without an error
- snap whoami command exists and prints the email address of the logged-in user.

I'm thus marking this as FIX-RELEASED