Abstract the cleanup logic and add helper for cache valid.

autocleanup.go

@@ -0,0 +1,18 @@
+package traefikoidc
+
+import "time"
+
+// autoCleanupRoutine runs a ticker that calls the provided cleanup function at the specified interval.
+// It stops when a value is received on the stop channel.
+func autoCleanupRoutine(interval time.Duration, stop <-chan struct{}, cleanup func()) {
+	ticker := time.NewTicker(interval)
+	defer ticker.Stop()
+	for {
+		select {
+		case <-ticker.C:
+			cleanup()
+		case <-stop:
+			return
+		}
+	}
+}