Makes welcome screen work using a sessions controller

app/controllers/users/sessions_controller.rb

@@ -0,0 +1,11 @@
+class Users::SessionsController < Devise::SessionsController
+
+  def after_sign_in_path_for(resource)
+    if resource.show_welcome_screen?
+      welcome_path
+    else
+      root_path
+    end
+  end
+
+end

app/models/user.rb

@@ -135,4 +135,8 @@ class User < ActiveRecord::Base
       !!(unconfirmed_email && unconfirmed_email !~ OMNIAUTH_EMAIL_REGEX)
   end
 
+  def show_welcome_screen?
+    sign_in_count == 1 && unverified? && !organization
+  end
+
 end

config/routes.rb

@@ -1,6 +1,7 @@
 Rails.application.routes.draw do
   devise_for :users, controllers: {
                        registrations: 'users/registrations',
+                       sessions: 'users/sessions',
                        omniauth_callbacks: 'users/omniauth_callbacks'
                      }
   devise_for :organizations, class_name: 'User',
@@ -27,6 +28,7 @@ Rails.application.routes.draw do
   root 'welcome#index'
   get '/welcome', to: 'welcome#welcome'
 
+
   resources :debates do
     member do
       post :vote