)

Prompt the user if they want to re-authenticate if they run
`coder login` when already authenticated.

Does not apply if they provided a token via flag or ENV
variable. A new token should be generated an stored in that situation
unless the `--use-token-as-session` flag was also used.

fix(cli): prompt user on login attempt with invalid ENV token

Fixes issue where if invalid token was set as ENV
variable a user would be unable to login until the ENV
variable was cleared.

User will now be informed that the token is invalid and
prompted to login normally.

Adds `coder auth` command with 3 sub-commands: `coder auth token`,
`coder auth status` and `coder auth login`.

`coder auth login`: This is the same command as `coder login`.

`coder auth status`: Informs the user about their authentication
status. It may make sense for this to not show an error
if called when user is not logged in.

`coder auth token`: Informs the user of their token string
and the expiration time of the token.

All the commands use a middleware to check that the user is
authenticated and will return an error if the user is not. They also
make at most 2 API calls.

The commands have additional values that could be shown but are not with
this implementation.