//will show the vents that a user is attending
    static func Events(for user: User, completion: @escaping ([Event]) -> Void)
    {
        var currentEvents = [Event]()

        //Getting firebase root directory
        let ref = Database.database().reference().child("users").child(user.uid).child("Attending")


        ref.observe(.value, with: { (snapshot) in
         //   print(snapshot)

//            guard snapshot.children.allObjects is [DataSnapshot] else {
//                return completion([])
//            }

            guard let eventDictionary = snapshot.value as? [String: Any] else {
                return completion([])
            }

          //  print(snapshot)
            let dispatchGroup = DispatchGroup()

            eventDictionary.forEach({ (key,value) in
             //   print(key)
             //   print(value)
                EventService.show(forEventKey: key , completion: { (event) in
                    dispatchGroup.enter()
                    AttendService.isEventAttended(event, byCurrentUserWithCompletion: { (isAttended) in
                        event?.isAttending = isAttended
                        dispatchGroup.leave()

                    })
                     currentEvents.append(.init(currentEventKey: key , dictionary: (event?.eventDictionary)!))
                })
            })

            dispatchGroup.notify(queue: .main, execute: {
                completion(currentEvents)
            })
        })
    }