This project requires the following matrix command:
/addwidget https://godot-matrix-rtc-letter-cars-widget.netlify.app/webapptest?widgetId=$matrix_widget_id&perParticipantE2EE=true&userId=$matrix_user_id&deviceId=$org.matrix.msc3819.matrix_device_id&baseUrl=$org.matrix.msc4039.matrix_base_url&roomId=$matrix_room_id