Currently, Studio uses GitHub auth for authentication. For command-line tools (studio ui, studio run etc) the authentication is done via personal access tokens. When no token is present (e.g. when you run studio for the first time), you will be asked to input your github username and password. Studio DOES NOT store your username or password, instead, those are being sent to GitHub API server in exchange to an access token. The access token is being saved and used from that point on. The personal access tokens do not expire, can be transferred from one machine to another, and, if necessary, can be revoked by going to GitHub -> Settings -> Developer Settings -> Personal Access Tokens

Authentication for the hosted UI server ( follows the standard GitHub Auth flow for web apps.