null checks for when specific root node is missing
null checks for when specific root node is missing

aarondcoleman/Fitbit.NET,amammay/Fitbit.NET,AlexGhiondea/Fitbit.NET,aarondcoleman/Fitbit.NET,AlexGhiondea/Fitbit.NET,WestDiscGolf/Fitbit.NET,AlexGhiondea/Fitbit.NET,WestDiscGolf/Fitbit.NET,amammay/Fitbit.NET,WestDiscGolf/Fitbit.NET,amammay/Fitbit.NET,aarondcoleman/Fitbit.NET