in app/models/user.rb [30:50]
def self.from_omniauth(auth)
user = where(provider: auth.provider, uid: auth.uid).first
return user if user
user = where(email: auth.info.email).first
return user if user
create do |user|
user.provider = auth.provider
user.uid = auth.uid
user.email = auth.info.email
user.password = Devise.friendly_token[0, 20]
user.firstname = auth.info.first_name
user.lastname = auth.info.last_name
end
end