[ "Players":{
  "R" : 0,
  "Team" : "Industry",
  "Y" : 0,
  "assists" : 0,
  "goals" : 20,
  "id" : 1,
  "image" : "http://res.cloudinary.com/deji/image/upload/v1509140819/industry.jpg_ballers_khc5fy.jpg",
  "name" : "Fabio",
  "position" : "midfielder",
  "price" : 6000000
}, {
  "R" : 0,
  "Team" : "Industry",
  "Y" : 0,
  "assists" : 0,
  "goals" : 8,
  "id" : 2,
  "image" : "http://res.cloudinary.com/deji/image/upload/v1509140819/industry.jpg_ballers_khc5fy.jpg",
  "name" : "Hassan 'Hasi' Akinyera",
  "position" : "defender",
  "price" : 5000000
},
    "users" : {
        "5UBG3yqWnRXe05bByUeASYVbY0l1" : {
          "email" : "john@gamail.com",
          "fullname" : "123456",
          "teamname" : "123456",
          "total" :  [ 1, 2, 3, 4, 5, 6 ],
          "userName" : "john@gamail.com",
          "week" : 0
        },
        "AotYBSfTDBhl7vbeWK7WFUh9s3i1" : {
          "email" : "vanessa@yahoo.com",
          "fullname" : "123456",
          "teamname" : "123456",
          "total" : [ 1, 2, 3, 4, 5, 6 ],
          "userName" : "vanessa@yahoo.com",
          "week" : 0
        },
        "l3J1TVsFNLMi0Oxg6hz4AJpacE53" : {
          "email" : "awoniyideji@yahoo.com",
          "fullname" : "Djflex11",
          "teamname" : "deji awoniyi",
          "total" : [ 1, 1, 5 ],
          "userName" : "awoniyideji@yahoo.com",
          "week" : "no"
        }
      }
    ]

$firebaseArray(Players)
            .$loaded(function(loadedPlayers) {
            var normalizedPlayers = loadedPlayers.reduce(function(acc, next) { acc[next.id] = next; return acc; }, {});
            var selectedPlayers = $scope.pick.map(function(num){
                return normalizedPlayers[num];
            });
            $scope.players = selectedPlayers;

                        $scope.sum = function(items, prop){
                        return items.reduce( function(a, b){
                        return a + b[prop];
                        }, 0);
                        };

    $scope.totalPoints = $scope.sum('Players', 'goals');
    userRef.set($scope.totalPoints);

});`