Improve coder cli re-login experience when api token is expired

[mattlqx]

We have a user that received this when trying to ssh to their workspace:

check entitlement warnings error: get user me: GET https://coder/api/v2/users/me: unexpected status code 401: You are signed out or your session has expired. Please sign in again to continue.: Try logging in using 'coder login <url>'.
        Error: API key expired at "2023-11-24 20:13:30.881157 +0000 UTC".
You are signed out or your session has expired. Please sign in again to continue.
Try logging in using 'coder login <url>'.
kex_exchange_identification: Connection closed by remote host

Since they see a URL from the unsuccessful API call, it's tempting to click that but it won't solve their problem. For re-logging in, instead of <url> in the message, would it be possible to display the URL there so it's a simple copy and paste operation?

Could the URL be optional so that coder login will just re-login to the same server?

[matifali]

Could the URL be optional so that coder login will just re-login to the same server?

This has been previously requested in a discord discussion

if url file exists ~/config/coderv2/url then coder login should be enought

@coder/pms I suggest we do this.

[mafredri]

For illustrative purposes, I'm adding a screenshot to show how jarring this issue really is:

User won't know what hit them. I would like to see the following changes:

1. Entitlement error never shows up unless it's the primary error
2. Same for GET:https://big.cdr.dev/api/v2/workspaces?q=owner%3Ame & co.
3. Expiry date doesn't seem all that important? We could skip it (maybe show in verbose mode)
4. As suggested, allow coder login to log into existing deployment, but update output to show "Authenticating with https://dev.coder.com..." or something similar.

Right now, we seem to be lacking a lot in CLI validation. This kind of error should definitely not be shown when typing coder login: