Updated member already exists error message
Updated member already exists error message

no refs.
- changed member already exists error message from "Duplicate email address"

bitjson/Ghost,e10/Ghost,janvt/Ghost,TryGhost/Ghost,ErisDS/Ghost,bitjson/Ghost,JohnONolan/Ghost,TryGhost/Ghost,JohnONolan/Ghost,TryGhost/Ghost,janvt/Ghost,ErisDS/Ghost,e10/Ghost,JohnONolan/Ghost,ErisDS/Ghost