allow custom server response, e.g. client_id instead of clientId
allow custom server response, e.g. client_id instead of clientId

fixes #346

18098924759/satellizer,sahat/satellizer,jianwang195823/satellizer,redwood-strategic/satellizer,redwood-strategic/satellizer,andyskw/satellizer,elanperach/satellizer,thandaanda/satellizer,gregoriusxu/satellizer,xscharlie/satellizer,SkydiverFL/satellizer,TheOneTheOnlyDavidBrown/satellizer,ezzaouia/satellizer,burasu/satellizer,zawmyolatt/satellizer,baratheraja/satellizer,jayzeng/satellizer,shikhardb/satellizer,bartekmis/satellizer,vebin/satellizer,redwood-strategic/satellizer,johan--/satellizer,expertmaksud/satellizer,shubham13jain/satellizer,redwood-strategic/satellizer,marfarma/satellizer,sahat/satellizer,thiagofesta/satellizer,rick4470/satellizer,johan--/satellizer,marceldiass/satellizer,memezilla/satellizer,bnicart/satellizer,themifycloud/satellizer,AmreeshTyagi/satellizer,suratpyari/satellizer,redwood-strategic/satellizer,viniciusferreira/satellizer,romcyncynatus/satellizer,IRlyDontKnow/satellizer,jonbgallant/satellizer,ABPFrameWorkGroup/satellizer,dgoguerra/satellizer,redwood-strategic/satellizer,raycoding/satellizer,redwood-strategic/satellizer,m-kostira/satellizer,redwood-strategic/satellizer,Manumental32/satellizer,romcyncynatus/satellizer,redwood-strategic/satellizer,manojpm/satellizer,heinbez/satellizer