app/controllers/api/v1/registrations_controller.rb
class Api::V1::RegistrationsController < ApplicationController
before_filter :allow_cors
respond_to :json
def create
user = User.new(params[:user])
if user.save
render :json=> user.as_json(:auth_token=>user.auth_keys.last.value, :email=>user.email), :status=>201
return
else
warden.custom_failure!
render :json=> user.errors, :status=>422
end
end
end