Complex sentence: Users of an'Individual' account are temporarily refered to as having a'Pending' account which have a textual representation of "STEAM_ID_PENDING" until their account credentatials are verified with the Steam service's authentication servers.
Split into simpler sentences: Users of an'Individual' account are temporarily refered to as having a'Pending'. Rather than following the format outlined above accounts which are pending verification have a textual representation of "STEAM_ID_PENDING" until their account credentatials are verified with the Steam service's authentication servers.