registrations_controller.rb

class RegistrationsController < Devise::RegistrationsController

  def create
    super # This calls Devise::RegistrationsController#create
    if resource.save
      # Mixpanel Create User Profile
      mixpanel.track(@user.id, 'Created Account', {
        '$first_name' => @user.first_name,
        '$gametag' => @user.game_tag,
        '$email' => @user.email,
        'Server' => @user.server
      })
      mixpanel.people.set(@user.id, {
        '$first_name' => @user.first_name,
        '$gametag' => @user.game_tag,
        '$email' => @user.email,
        'Server' => @user.server,
        'Website' => @user.website?,
        'Twitch' => @user.twitch_link?,
        'Facebook' => @user.facebook_link?,
        'Twitter' => @user.twitter_link?,
        'Youtube' => @user.youtube_link?,
        'Screenshots' => 0,
        'Followers' => 0,
        'Following' => 0,
        'Likes' => 0,
        'Comments' => 0
      })
    end
  end

  def update
    account_update_params = devise_parameter_sanitizer.sanitize(:account_update)

    # required for settings form to submit when password is left blank
    if account_update_params[:password].blank?
      account_update_params.delete("password")
      account_update_params.delete("password_confirmation")
    end

    @user = User.find(current_user.id)
    if @user.update_attributes(account_update_params)
      set_flash_message :notice, :updated
      sign_in @user, :bypass => true

      # Mixpanel Update User Profile
      mixpanel.people.set(@user.id, {
        '$first_name' => @user.first_name,
        '$email' => @user.email,
        'Server' => @user.server,
        'Website' => @user.website?,
        'Twitch' => @user.twitch_link?,
        'Facebook' => @user.facebook_link?,
        'Twitter' => @user.twitter_link?,
        'Youtube' => @user.youtube_link?,
      })

      redirect_to after_update_path_for(@user)
    else
      render 'edit'
    end

  end

  def destroy
    # Delete Mixpanel Profile
    mixpanel.track(@user.id, 'Deleted Account')
    mixpanel.people.delete_user(@user.id)

    resource.destroy
    Devise.sign_out_all_scopes ? sign_out : sign_out(resource_name)
    yield resource if block_given?
    respond_with_navigational(resource){ redirect_to after_sign_out_path_for(resource_name) }
  end

  protected

  def after_update_path_for(resource)
    :back
  end

end




###### application_controller.rb
  # def mixpanel
  #   if Rails.env.production?
  #     @mixpanel ||= Mixpanel::Tracker.new('TOKEN')
  #   else
  #     @mixpanel ||= Mixpanel::Tracker.new('TOKEN')
  #   end
  # end