adds auth section intro
adds auth section intro

nelsonic/learn-hapi,iteles/learn-hapi,tbenade/learn-hapi,ishan-marikar/learn-hapi,tbenade/learn-hapi,samrocksc/learn-hapi,ishan-marikar/learn-hapi,rorysedgwick/learn-hapi,iteles/learn-hapi,nubark/learn-hapi,nelsonic/learn-hapi,samrocksc/learn-hapi,nubark/learn-hapi,rorysedgwick/learn-hapi,giulianolatini/learn-hapi,giulianolatini/learn-hapi