Updates to code sample
Updates to code sample

Changed to use lock -apiClient rather than A0ApiClient sharedInstance which appears to be deprecated.
Added a couple of lines to show where the id_token comes from (took me a bit of trial and error to get this right).
Catografix/docs,hamzawi06/docs,yvonnewilson/docs,Annyv2/docs,Annyv2/docs,auth0/docs,hamzawi06/docs,khorne3/docs,Annyv2/docs,yvonnewilson/docs,Catografix/docs,auth0/docs,hamzawi06/docs,Catografix/docs,jeffreylees/docs,khorne3/docs,sandrinodimattia/docs,yvonnewilson/docs,khorne3/docs,sandrinodimattia/docs,miparnisari/docs,jeffreylees/docs,sandrinodimattia/docs,jeffreylees/docs,auth0/docs