Several changes

types.go

@@ -1,7 +1,7 @@
 package main
 
 import (
-
+	"sync"
 	"github.com/diamondburned/gotk4/pkg/gtk/v4"
 )
 
@@ -17,3 +17,10 @@ type lambdaConfig struct {
 	Insecure bool 
 	Nick string
 }
+
+
+type mucUnit struct {
+	// key: OccupantID
+	// value: last user presence
+	Members sync.Map
+}