So after i grant a user an item from the catalogue am trying to add its ItemInstanceId to userdata but i get this error "Cannot read property 'ItemInstanceId' of undefined"
here is the code
var grantedItems = server.GrantItemsToUsers({ ItemGrants: [ { PlayFabId: currentPlayerId, ItemId: "AirStrike" }, { PlayFabId: currentPlayerId, ItemId: "Heal" } ] }); server.UpdateUserData("Loadout","{\"Abilities\":[\"" + grantedItems[0].ItemInstanceId + "\",\"" + grantedItems[1].ItemInstanceId + "\"]}");
The variable “grantedItems” in your code is the callback result of Grant Items To User API, which is not an array. Therefore, “grantedItems[0]” will be undefined, and “grantedItems[0].ItemInstanceId” will cause the error that you got.
You could try “grantedItems.ItemGrantResults[0].ItemInstanceId “ to get the data you want. Please refer to this API document Grant Items To User and check the correct format of the response.
In addition, you will still need to refer and define a proper request for UpdateUserData. you will need to specify PlayFabId and contain the information in the Data property of request. This API should be called sperately for each player.
Thanks for the anwer and for pointing out the other problems i had in the code, i actually looked at the documentation but it wasn't very clear for me, thanks again everything is working fine now.
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