// ドロップテーブルから取得するアイテムを抽選
private static async Task <string> EvaluateRandomResultTable(FunctionExecutionContext <dynamic> context, dynamic dropTableName)
{
var serverApi = new PlayFabServerInstanceAPI(context.ApiSettings, context.AuthenticationContext);
var result = await serverApi.EvaluateRandomResultTableAsync(new EvaluateRandomResultTableRequest()
{
TableId = dropTableName
});
return(result.Result.ResultItemId);
}