Features Add Google oauth 2.0 support to login to MantisBT. User must have an existing MantisBT account. Signup / account creation scenario is not supported. How to install Copy GoogleOauth folder into plugins folder. Open Mantis with browser. Log in as administrator. Go to Manage -> Manage Plugins. Find GoogleOauth in the list. Click Install. How to use Go to Google Developers Console and create the new project. Copy client id and secret key to google oauth setting page. Click the save button. Supported Versions MantisBT 1.2.x - supported MantisBT 1.3.x - not supported MantisBT 2.6 and higher - supported