Studio OSBriefs move through Zlan's own approval chain. Everyone sees what's on their desk, and how long it has been there.
Use the Google account Zlan added you with: your Zlan email, or your own Gmail. Same password you already use there. There's no separate Studio OS password.
Only people Zlan has added can get in. New here, or can't get in? Ask Merlyn (HR) or Athulya.