fd1da055__contacts___Janrain_Developers__Parameter
[ReqRequired] No [Description] Values are true and false. If true returns a value that identifies if a user has previously authenticated with the Janrain application before. Available to the following providers: Facebook, Twitter, LinkedIn, Salesforce, Mixi, Disqus, Tumblr, Sina Weibo, RenRen, Soundcloud, and VK. [Parameter] 
existingUser string
a p i K e y s t r i n g
i d e n t i f i e r s t r i n g
c o n t a c t T y p e s t r i n g
f o r m a t s t r i n g
e x i s t i n g U s e r s t r i n g
p r o v i d e r F i e l d s s t r i n g
Social Login: Login/get_contacts | Janrain Developers
Parameter