When runningcoder login a not-so-friendly error is thrown to the user.
It would be nice if it said something like "Please provide a valid URL" or something similar, or even a prompt.

Otherwise, I also think the CLI could remember the last instance URL and prompt you asking if you want to use it again or not.

PSC:\Users\Phorcys>coderloginbuildinfo:Get"https:///api/v2/buildinfo":http:noHostinrequestURLEncounteredanerrorrunning"coderlogin"Failedtocheckserver"https:"forfirstuser,istheURLcorrectandiscoderaccessiblefromyourbrowser?Error-hasinitialuser:Get"https:///api/v2/users/first":http:noHostinrequestURLx

Coder v2.4.0+d19a762

cc:@matifali