Dim Job As HttpJob
Job.Initialize("fcm", Me)
Dim m As Map = CreateMap("to": $"/topics/${Topic}"$)
Dim data As Map = CreateMap("title": "https://google.com", "body": Body , "type":"link")
m.Put("data": data)
Dim jg As JSONGenerator
jg.Initialize(m)
Job.PostString("https://fcm.googleapis.com/fcm/send", jg.ToString)
Job.GetRequest.SetContentType("application/json")
Job.GetRequest.SetHeader("Authorization", "key=" & API_KEY)