Omniauth callback with Twitter

Gemfile dev_test

group :development, :test do
  gem 'rspec'
  gem 'factory_girl_rails'
  gem 'pry-rails'           # Causes rails console to open pry
                            # https://github.com/rweng/pry-rails
  gem 'pry-debugger'        # Adds step, next, finish, and continue commands and breakpoints
                            # https://github.com/nixme/pry-debugger
  gem 'pry-stack_explorer'  # Navigate the call-stack
                            # https://github.com/pry/pry-stack_explorer
  gem 'annotate'            # Annotate all your models, tests, fixtures, and factories
                            # https://github.com/ctran/annotate_models
  gem 'quiet_assets'        # Turns off the Rails asset pipeline log
                            # https://github.com/evrone/quiet_assets
  # gem 'better_errors'       # Replaces the standard Rails error page with a much better and more useful error page
                            # https://github.com/charliesome/better_errors
  gem 'binding_of_caller'   # Advanced features for better_errors advanced features (REPL, local/instance variable inspection, pretty stack frame names)
                            # https://github.com/banister/binding_of_caller
  gem 'meta_request'        # Supporting gem for Rails Panel (Google Chrome extension for Rails development).
                            # https://github.com/dejan/rails_panel/tree/master/meta_request
  gem 'rails-erd'           # Diagrams your models. NOTE! $ brew install graphviz
                            # https://github.com/voormedia/rails-erd
  gem 'rspec-rails', '~> 2.0' # Rspec-rails is a testing framework for Rails 3.x and 4.x.
  gem 'dotenv-rails'        # $touch .env
end

OmniTwit

class OmniauthCallbacksController < Devise::OmniauthCallbacksController

  def twitter

    # You need to implement the method below in your model (e.g. app/models/user.rb)
    @user = User.find_for_twitter_oauth(request.env["omniauth.auth"], current_user)

    if @user.persisted?
      sign_in_and_redirect @user, :event => :authentication #this will throw if @user is not activated
      set_flash_message(:notice, :success, :kind => "Twitter") if is_navigational_format?
    else
      session["devise.twitter_data"] = request.env["omniauth.auth"]
      redirect_to new_user_registration_url
    end

  end

end