Escape user id
Escape user id

id has the form "auth0|foo123", Ruby URI doesn't like "|".

ignaciojonas/ruby-auth0,ignaciojonas/ruby-auth0,ChuckJHardy/ruby-auth0,ChuckJHardy/ruby-auth0,auth0/ruby-auth0,auth0/ruby-auth0,ignaciojonas/ruby-auth0