Merge pull request #2545 from posit-dev/dotnomad/server-down-err

Include connectivity to server check in invalid server or credentials error

internal/clients/connect/client_connect.go

@@ -86,7 +86,7 @@ func (u *UserDTO) CanPublish() bool {
 	return u.UserRole == AuthRoleAdmin || u.UserRole == AuthRolePublisher
 }
 
-var errInvalidServerOrCredentials = errors.New("could not validate credentials; check server URL and API key or token")
+var errInvalidServerOrCredentials = errors.New("could not validate credentials; check connectivity to the server, the URL, and API key")
 var errInvalidApiKey = errors.New("could not log in with the provided credentials")
 var errInvalidServer = errors.New("could not access the server; check the server URL and try again")