Android Question How to destroy FirebaseMessaging programmatically?

Private Sub Timer1_Tick
    StartService(FirebaseMessaging)
    CallSubDelayed(FirebaseMessaging, "SubscribeToTopics")
End Sub

Sub Service_Start (StartingIntent As Intent) 
    xui.SetDataFolder("kvs")
    KVS.Initialize(xui.DefaultFolder, "kvs.dat")
    If KVS.Get("BildirimlerAcik") Then
        If StartingIntent.IsInitialized Then fm.HandleIntent(StartingIntent)
        Sleep(0)
        Service.StopAutomaticForeground 'remove if not using B4A v8+.
    Else
        StopService(Me) 
    End If
End Sub

Private Sub CheckBoxUyari_CheckedChange(Checked As Boolean)
    xui.SetDataFolder("kvs")
    KVS.Initialize(xui.DefaultFolder, "kvs.dat")
    If Checked Then
        KVS.Put("BildirimlerAcik", True) 
    Else
        KVS.Put("BildirimlerAcik", False) 
    End If 
End Sub