This plugin connects your site to Mattermost, allowing users to log in securely via OAuth2 and receive notifications for various site activities. It's designed for site administrators and teams who use Mattermost for communication and want to centralize authentication and monitoring.

• OAuth2 authentication: Users can log in or register on your site using their Mattermost credentials, simplifying access and enhancing security.
• Login notifications: Get alerts for successful logins, failed attempts, and unknown user access to monitor site activity in real-time.
• User management alerts: Receive notifications for events like new user creation, edits, deletions, and admin email changes to keep track of user changes.
• Plugin activity notifications: Stay informed about plugin activations, deactivations, and uninstallations to manage site components effectively.
• Customizable messaging: Post notifications to specific Mattermost channels or users, override bot names, and mention users for tailored communication.