Not able to login with another account in kiro, and I have kilo subscription in another account

## Problem

## Steps to reproduce the issue

## Expected behavior

## System details (run `AWS: About` and/or `Amazon Q: About`)

- OS:
- Visual Studio Code version:
- AWS Toolkit version:
- Amazon Q version:

The issue provides no error message, reproduction steps, system details, file, or test to inspect. Start by obtaining the missing login scenario and account-switching context, then locate the authentication entry point in the VS Code extension; done should be demonstrated by a reproducible account switch with the expected subscription account selected.

Written by the indexing model from the issue text.