{"message":"UMM Backend API","version":"1.0.0","authentication":"AWS Cognito ID Token required","endpoints":{"GET /umm/settings":"Get notifications settings","POST /umm/settings":"Post notifications settings","GET /umm/messages":"Get UMM messages","GET /umm/dashboardFilters":"Get dashboard filters","GET /umm/stream":"Server-Sent Events stream for real-time updates","POST /umm/trigger":"Trigger event to broadcast to SSE clients","GET /umm/health":"Health check endpoint"}}