diff --git a/Gemfile b/Gemfile
index 274ad086..947b17c8 100644
--- a/Gemfile
+++ b/Gemfile
@@ -14,6 +14,11 @@ gem 'paper_trail'
 
 # Use devise as authentification framework
 gem 'devise'
+# Use omniauth to support openID authentication
+gem 'omniauth'
+gem 'omniauth-facebook'
+gem 'omniauth-openid'
+gem 'omniauth-google-oauth2'
 
 # Use cancan as authorization framework
 gem 'cancan'
diff --git a/Gemfile.lock b/Gemfile.lock
index ea81b1c9..5b210e94 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -103,6 +103,8 @@ GEM
     factory_girl_rails (4.4.1)
       factory_girl (~> 4.4.0)
       railties (>= 3.0.0)
+    faraday (0.9.0)
+      multipart-post (>= 1.2, < 3)
     ffi (1.9.3)
     formatador (0.2.4)
     formtastic (2.3.0.rc3)
@@ -126,6 +128,7 @@ GEM
       activesupport (>= 4.0.1)
       haml (>= 3.1, < 5.0)
       railties (>= 4.0.1)
+    hashie (2.1.1)
     hike (1.2.3)
     hoptoad_notifier (2.4.11)
       activesupport
@@ -143,6 +146,7 @@ GEM
     jquery-ui-rails (4.2.1)
       railties (>= 3.2.16)
     json (1.8.1)
+    jwt (1.0.0)
     launchy (2.4.2)
       addressable (~> 2.3)
     letter_opener (1.2.0)
@@ -162,10 +166,34 @@ GEM
     mini_portile (0.6.0)
     minitest (5.3.3)
     multi_json (1.9.2)
+    multi_xml (0.5.5)
+    multipart-post (2.0.0)
     mysql2 (0.3.16)
     nio4r (1.0.0)
     nokogiri (1.6.2.1)
       mini_portile (= 0.6.0)
+    oauth2 (0.9.4)
+      faraday (>= 0.8, < 0.10)
+      jwt (~> 1.0)
+      multi_json (~> 1.3)
+      multi_xml (~> 0.5)
+      rack (~> 1.2)
+    omniauth (1.2.1)
+      hashie (>= 1.2, < 3)
+      rack (~> 1.0)
+    omniauth-facebook (1.6.0)
+      omniauth-oauth2 (~> 1.1)
+    omniauth-google-oauth2 (0.2.4)
+      omniauth (~> 1.0)
+      omniauth-oauth2 (~> 1.1)
+    omniauth-oauth2 (1.1.2)
+      faraday (>= 0.8, < 0.10)
+      multi_json (~> 1.3)
+      oauth2 (~> 0.9.3)
+      omniauth (~> 1.2)
+    omniauth-openid (1.0.1)
+      omniauth (~> 1.0)
+      rack-openid (~> 1.3.1)
     orm_adapter (0.5.0)
     paper_trail (3.0.1)
       activerecord (>= 3.0, < 5.0)
@@ -196,6 +224,9 @@ GEM
     quiet_assets (1.0.2)
       railties (>= 3.1, < 5.0)
     rack (1.5.2)
+    rack-openid (1.3.1)
+      rack (>= 1.1.0)
+      ruby-openid (>= 2.1.8)
     rack-test (0.6.2)
       rack (>= 1.0)
     rails (4.1.0)
@@ -259,6 +290,7 @@ GEM
       powerpack (~> 0.0.6)
       rainbow (>= 1.99.1, < 3.0)
       ruby-progressbar (~> 1.4)
+    ruby-openid (2.5.0)
     ruby-progressbar (1.5.1)
     rubyzip (1.0.0)
     sass (3.2.19)
@@ -346,6 +378,10 @@ DEPENDENCIES
   jquery-ui-rails
   letter_opener
   mysql2
+  omniauth
+  omniauth-facebook
+  omniauth-google-oauth2
+  omniauth-openid
   paper_trail
   paperclip
   prawn_rails
diff --git a/app/assets/images/facebook.png b/app/assets/images/facebook.png
new file mode 100644
index 00000000..e8bca65f
Binary files /dev/null and b/app/assets/images/facebook.png differ
diff --git a/app/assets/images/google.png b/app/assets/images/google.png
new file mode 100644
index 00000000..3909e9de
Binary files /dev/null and b/app/assets/images/google.png differ
diff --git a/app/assets/images/novell.png b/app/assets/images/novell.png
new file mode 100644
index 00000000..a33e55e2
Binary files /dev/null and b/app/assets/images/novell.png differ
diff --git a/app/controllers/registrations_controller.rb b/app/controllers/registrations_controller.rb
index cd3a9ca9..b6137bac 100644
--- a/app/controllers/registrations_controller.rb
+++ b/app/controllers/registrations_controller.rb
@@ -1,6 +1,10 @@
 class RegistrationsController < Devise::RegistrationsController
   before_action :configure_permitted_parameters, if: :devise_controller?
 
+  def edit
+    @openids = Openid.where(user_id: current_user.id).order(:provider)
+  end
+
   def update
     @user = User.find(current_user.id)
     email_changed = false
diff --git a/app/controllers/users/omniauth_callbacks_controller.rb b/app/controllers/users/omniauth_callbacks_controller.rb
new file mode 100644
index 00000000..6b9004b4
--- /dev/null
+++ b/app/controllers/users/omniauth_callbacks_controller.rb
@@ -0,0 +1,32 @@
+class Users::OmniauthCallbacksController < Devise::OmniauthCallbacksController
+  skip_before_filter :verify_authenticity_token
+
+  [:novell, :google, :facebook, :twitter].each do |provider|
+    define_method(provider) { handle(provider) }
+  end
+
+  private
+    def handle(provider)
+
+      auth_hash = request.env['omniauth.auth']
+      openid = Openid.find_for_oauth(auth_hash) # Get or create openid
+      # If openid exists and is associated with a user, sign in with associated user,
+      # even if the email of the associated user and the email of the provided openid are different
+      unless user = openid.user
+        user = User.find_for_auth(auth_hash, current_user) # Get or create users
+      end
+
+      begin
+        user.save!
+        if openid.user != user
+          openid.user = user
+        end
+        openid.save!
+
+        sign_in user
+        redirect_to root_path, notice: user.email + " signed in successfully with #{provider}"
+      rescue Exception => e
+        redirect_back_or_to new_user_registration_path, alert: 'Failed' + e.message
+      end
+    end
+end
\ No newline at end of file
diff --git a/app/models/openid.rb b/app/models/openid.rb
new file mode 100644
index 00000000..b85a1525
--- /dev/null
+++ b/app/models/openid.rb
@@ -0,0 +1,22 @@
+class Openid < ActiveRecord::Base
+  belongs_to :user
+  validates :provider, :uid, :presence => true
+
+  # Searches for openid based on provider and uid.
+  # Returns found openid or a new openid.
+  # ====Returns
+  # * Openid::ActiveRecord_Relation -> openid
+  def self.find_for_oauth(auth)
+    openid = Openid.where(provider: auth.provider, uid: auth.uid).first_or_initialize
+
+    if openid.new_record?
+      openid.email = auth.info.email
+      if existing_openid = Openid.where(email: openid.email).first
+        openid.user_id = existing_openid.user_id
+      end
+    end
+    openid
+
+  end
+
+end
diff --git a/app/models/user.rb b/app/models/user.rb
index 21200f4a..3bd4fad8 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -4,13 +4,15 @@ class User < ActiveRecord::Base
   # :token_authenticatable, :confirmable,
   # :lockable, :timeoutable and :omniauthable
   devise :database_authenticatable, :registerable,
-         :recoverable, :rememberable, :trackable, :validatable,
-         :confirmable
+         :recoverable, :rememberable, :trackable, :validatable, :confirmable,
+         :omniauthable, omniauth_providers: [:novell, :google, :facebook]
 
   has_and_belongs_to_many :roles
   has_one :person, :inverse_of => :user
+  has_many :openids
 
-  attr_accessible :email, :password, :password_confirmation, :remember_me, :role_id, :role_ids, :person_attributes
+  attr_accessible :email, :password, :password_confirmation, :remember_me, :role_id, :role_ids,
+                  :person_attributes
   accepts_nested_attributes_for :person
   accepts_nested_attributes_for :roles
 
@@ -19,6 +21,26 @@ class User < ActiveRecord::Base
 
   delegate :last_name, :first_name, :public_name, to: :person
 
+  # Searches for user based on email. Returns found user or new user.
+  # ====Returns
+  # * +User::ActiveRecord_Relation+ -> user
+  def self.find_for_auth(auth, current_user = nil)
+
+    user = current_user
+
+    if user.nil? # No current user available, user is not already logged in
+      user = User.where(email: auth.info.email).first_or_initialize
+    end
+
+    if user.new_record?
+      user.email = auth.info.email
+      user.password = Devise.friendly_token[0,20]
+      user.skip_confirmation!
+    end
+
+    user
+  end
+
   def role?(role)
     Rails.logger.debug("Checking role in user")
     !!roles.find_by_name(role.to_s.downcase.camelize)
diff --git a/app/views/devise/registrations/edit.html.haml b/app/views/devise/registrations/edit.html.haml
index 435b5bff..36992da5 100644
--- a/app/views/devise/registrations/edit.html.haml
+++ b/app/views/devise/registrations/edit.html.haml
@@ -15,6 +15,18 @@
           %br
           %br
           = render :partial => 'devise/registrations/volunteerperson', :locals => {:p => p}
+      = f.inputs :name => 'OpenID' do
+        %h4
+          Currently using the following openIDs:
+        - @openids.each do |openid|
+          = openid.provider
+          = openid.email
+          %br
+        %h4
+          To add an openID to your account using a different email address, sign in with your
+          openID while logged in to OSEM
+        = render 'devise/shared/openid'
+
       = f.inputs :name => "Account" do
         = f.input :email, :required => false
         = f.input :password, :hint => "(Leave blank if you don't want to change it)", :input_html => {:autocomplete => "off"}
diff --git a/app/views/devise/registrations/new.html.haml b/app/views/devise/registrations/new.html.haml
index d9e25ccd..1badafdb 100644
--- a/app/views/devise/registrations/new.html.haml
+++ b/app/views/devise/registrations/new.html.haml
@@ -3,13 +3,17 @@
     %h1.text-center Sign Up
   .col-md-5.col-md-offset-1
     .well
-      = semantic_form_for(resource, :as => resource_name, :url => registration_path(resource_name)) do |f|
+      = semantic_form_for(resource, as: resource_name, url: registration_path(resource_name)) do |f|
         = f.input :email
         = f.input :password
         = f.input :password_confirmation
-        = f.action :submit, :as => :button, :label => "Sign Up", :button_html => {:class => "btn btn-primary"}
-  .col-md-3.col-md-offset-2
+        = f.action :submit, as: :button, label: 'Sign Up', button_html: {class: 'btn btn-primary'}
+        %br
+        %br
+        %h4 Already have an account?
+      = render 'devise/shared/links'
+  .col-md-4
     .well
-      %h4
-        Already have an account?
-      = render "devise/shared/links"
+      %h4 Or use your openID
+
+      = render 'devise/shared/openid'
\ No newline at end of file
diff --git a/app/views/devise/sessions/new.html.haml b/app/views/devise/sessions/new.html.haml
new file mode 100644
index 00000000..180aa561
--- /dev/null
+++ b/app/views/devise/sessions/new.html.haml
@@ -0,0 +1,21 @@
+.row
+  .page-header
+    %h2.text-center Sign In
+  .col-md-5.col-md-offset-1
+    .well
+      = semantic_form_for(resource, as: resource_name, url: session_path(resource_name)) do |f|
+        = f.input :email
+        = f.input :password
+        - if devise_mapping.rememberable?
+          = f.check_box :remember_me
+          = f.label 'Remember me'
+        %br
+        = f.action :submit, as: :button, label: 'Sign In', button_html: {class: 'btn btn-primary'}
+        %br
+        %br
+        = render "devise/shared/links"
+
+  .col-md-4
+    .well
+      %h4 Or use your openID
+      = render 'devise/shared/openid'
\ No newline at end of file
diff --git a/app/views/devise/shared/_links.erb b/app/views/devise/shared/_links.erb
new file mode 100644
index 00000000..b9123456
--- /dev/null
+++ b/app/views/devise/shared/_links.erb
@@ -0,0 +1,19 @@
+<%- if controller_name != 'sessions' %>
+  <%= link_to "Sign in", new_user_session_path %><br />
+<% end -%>
+
+<%- if devise_mapping.registerable? && controller_name != 'registrations' %>
+  <%= link_to "Sign up", new_registration_path(resource_name) %><br />
+<% end -%>
+
+<%- if devise_mapping.recoverable? && controller_name != 'passwords' && controller_name != 'registrations' %>
+  <%= link_to "Forgot your password?", new_password_path(resource_name) %><br />
+<% end -%>
+
+<%- if devise_mapping.confirmable? && controller_name != 'confirmations' %>
+  <%= link_to "Didn't receive confirmation instructions?", new_confirmation_path(resource_name) %><br />
+<% end -%>
+
+<%- if devise_mapping.lockable? && resource_class.unlock_strategy_enabled?(:email) && controller_name != 'unlocks' %>
+  <%= link_to "Didn't receive unlock instructions?", new_unlock_path(resource_name) %><br />
+<% end -%>
diff --git a/app/views/devise/shared/_openid.html.haml b/app/views/devise/shared/_openid.html.haml
new file mode 100644
index 00000000..f9e2057e
--- /dev/null
+++ b/app/views/devise/shared/_openid.html.haml
@@ -0,0 +1,4 @@
+- if devise_mapping.omniauthable?
+  - resource_class.omniauth_providers.each do |provider|
+    = link_to image_tag("#{provider}.png", size: '32x32') + provider , omniauth_authorize_path(resource_name, provider)
+    %br
\ No newline at end of file
diff --git a/app/views/layouts/_navigation.html.haml b/app/views/layouts/_navigation.html.haml
index d63dd137..775c4bcf 100644
--- a/app/views/layouts/_navigation.html.haml
+++ b/app/views/layouts/_navigation.html.haml
@@ -51,5 +51,6 @@
                   %button.btn.btn-block Sign in
                   %br
                   = link_to "Forgot your password?", new_password_path('user')
+                = link_to 'Sign in with openID', new_user_session_path
             %li.hidden-lg
               = link_to('Sign In', new_user_session_path)
diff --git a/config/initializers/devise.rb b/config/initializers/devise.rb
index 2dc7d680..06d3d126 100644
--- a/config/initializers/devise.rb
+++ b/config/initializers/devise.rb
@@ -1,9 +1,21 @@
 # Use this hook to configure devise mailer, warden hooks and so forth.
 # Many of these configuration options can be set straight in your model.
+
 Devise.setup do |config|
   # ==> Secret key, generate one with `rake secret`
   config.secret_key = Rails.application.secrets.devise_secret_key
 
+  # ==> openIDs configuration
+  # Define the available openID providers that can be used to log in
+  # Pass each provider to User model in :omniauth_providers (for open_id providers use their name)
+  # Include provider in users/omniauth_callbacks_controller.rb
+
+  config.omniauth :open_id, name: 'novell', identifier: 'http://www.opensuse.org/openid/user'
+  config.omniauth :google_oauth2, Rails.application.secrets.google_key, Rails.application.secrets.google_secret, {
+    name: 'google',
+    scope: 'email' }
+  config.omniauth :facebook, Rails.application.secrets.facebook_key, Rails.application.secrets.facebook_secret
+
   # ==> Mailer Configuration
   # Configure the e-mail address which will be shown in Devise::Mailer,
   # note that it will be overwritten if you use your own mailer class with default "from" parameter.
diff --git a/config/routes.rb b/config/routes.rb
index ae46877b..30c401ca 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -2,7 +2,9 @@ Osem::Application.routes.draw do
 
   get 'conference/show'
 
-  devise_for :users, controllers: { registrations: :registrations }, path: 'accounts'
+  devise_for :users, :controllers => { registrations: :registrations,
+                                       omniauth_callbacks: 'users/omniauth_callbacks' },
+             :path => 'accounts'
 
   namespace :admin do
     resources :users
diff --git a/db/migrate/20140603092041_create_openids.rb b/db/migrate/20140603092041_create_openids.rb
new file mode 100644
index 00000000..8c55e8fd
--- /dev/null
+++ b/db/migrate/20140603092041_create_openids.rb
@@ -0,0 +1,12 @@
+class CreateOpenids< ActiveRecord::Migration
+  def change
+    create_table :openids do |t|
+      t.string :provider
+      t.string :email
+      t.string :uid
+      t.integer :user_id
+
+      t.timestamps
+    end
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 030cce43..557c2177 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20140617145048) do
+ActiveRecord::Schema.define(version: 20140618062623) do
 
   create_table "answers", force: true do |t|
     t.string   "title"
@@ -82,11 +82,11 @@ ActiveRecord::Schema.define(version: 20140617145048) do
     t.text     "description"
     t.text     "registration_description"
     t.text     "ticket_description"
+    t.text     "sponsor_description"
+    t.string   "sponsor_email"
     t.string   "twitter_url"
     t.string   "facebook_url"
     t.string   "google_url"
-    t.text     "sponsor_description"
-    t.string   "sponsor_email"
     t.text     "lodging_description"
     t.boolean  "include_registrations_in_splash", default: false
     t.boolean  "include_sponsors_in_splash",      default: false
@@ -213,6 +213,15 @@ ActiveRecord::Schema.define(version: 20140617145048) do
     t.string   "website_link"
   end
 
+  create_table "openids", force: true do |t|
+    t.string   "provider"
+    t.string   "email"
+    t.string   "uid"
+    t.integer  "user_id"
+    t.datetime "created_at"
+    t.datetime "updated_at"
+  end
+
   create_table "people", force: true do |t|
     t.string   "guid",                              null: false
     t.string   "first_name",           default: ""
diff --git a/spec/features/omniauth_spec.rb b/spec/features/omniauth_spec.rb
new file mode 100644
index 00000000..9e9ef482
--- /dev/null
+++ b/spec/features/omniauth_spec.rb
@@ -0,0 +1,108 @@
+require 'spec_helper'
+
+feature Openid do
+  let!(:participant_role) { create(:participant_role) }
+  let!(:admin_role) { create(:admin_role) }
+
+  describe 'sign in with openid' do
+
+    it 'has option to log in with Google account' do
+      visit '/accounts/sign_in'
+      expect(page.has_content?('Or use your openID')).to be true
+      expect(page.has_content?('google')).to be true
+    end
+
+    it 'signs in *new* user with Google account' do
+      expected_count_openid = Openid.count + 1
+      expected_count_user = User.count + 1
+      visit '/accounts/sign_in'
+
+      mock_auth_new_user
+      click_link 'google'
+      expect(flash).to eq('test-1@gmail.com signed in successfully with google')
+      expect(Openid.count).to eq(expected_count_openid)
+      expect(User.count).to eq(expected_count_user)
+    end
+
+    it 'signs in an existing user' do
+      create(:participant, email: 'test-participant-1@google.com')
+      expected_count_openid = Openid.count + 1
+      expected_count_user = User.count
+      visit '/accounts/sign_in'
+
+      mock_auth_existing_user_participant
+      click_link 'google'
+      expect(flash).to eq('test-participant-1@google.com signed in successfully with google')
+      expect(Openid.count).to eq(expected_count_openid)
+      expect(User.count).to eq(expected_count_user)
+    end
+
+    it 'can handle authentication error' do
+      OmniAuth.config.mock_auth[:google] = :invalid_credentials
+      visit '/accounts/sign_in'
+      expect(page.has_content?('Or use your openID')).to be true
+      click_link 'google'
+      expect(flash).to eq("Could not authenticate you from Google because \"Invalid credentials\".")
+    end
+
+    it 'adds openid to existing user' do
+      # Sign in user
+      user = create(:participant, email: 'test-participant-1@google.com')
+      sign_in user
+
+      # Add openID to current user
+      expected_count_openid = Openid.count + 1
+      expected_count_user = User.count
+      visit '/accounts/edit'
+
+      mock_auth_new_user
+      click_link 'google'
+      expect(flash).to eq('test-participant-1@google.com signed in successfully with google')
+      expect(Openid.count).to eq(expected_count_openid)
+      expect(User.count).to eq(expected_count_user)
+      expect(Openid.where(email: 'test-1@gmail.com').first.nil?).to eq(false)
+    end
+
+    it 'signs in with openID using the same email as another associated openid' do |user|
+      # Sign in user
+      user = create(:participant, email: 'test-participant-1@google.com')
+      expected_count_openid = Openid.count + 1
+      expected_count_user = User.count
+      visit '/accounts/sign_in'
+
+      mock_auth_existing_user_participant
+      click_link 'google'
+      expect(flash).to eq('test-participant-1@google.com signed in successfully with google')
+      expect(Openid.count).to eq(expected_count_openid)
+      expect(User.count).to eq(expected_count_user)
+
+      # Add openID to current user with email test-1@gmail.com
+      expected_count_openid = Openid.count + 1
+      expected_count_user = User.count
+      visit '/accounts/edit'
+
+      mock_auth_new_user
+      click_link 'google'
+      expect(flash).to eq('test-participant-1@google.com signed in successfully with google')
+      expect(Openid.count).to eq(expected_count_openid)
+      expect(User.count).to eq(expected_count_user)
+      expect(Openid.where(email: 'test-participant-1@google.com').first.nil?).to eq(false)
+      expect(Openid.where(email: 'test-1@gmail.com').first.nil?).to eq(false)
+
+      # Sign in with different openID using same email (test-1@gmail.com)
+      sign_out
+      expected_count_openid = Openid.count + 1
+      expected_count_user = User.count
+
+      visit '/accounts/sign_in'
+      mock_auth_new_user_fb
+      click_link 'facebook'
+      expect(flash).to eq('test-participant-1@google.com signed in successfully with facebook')
+      expect(Openid.count).to eq(expected_count_openid)
+      expect(User.count).to eq(expected_count_user)
+      last_openid = Openid.last
+      expect(last_openid.uid).to eq('facebook-test-uid-1')
+      expect(last_openid.email).to eq('test-1@gmail.com')
+    end
+  end
+end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 318b1650..0776c1b8 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -53,6 +53,9 @@ RSpec.configure do |config|
   # Includes support/login_macros for feature tests
   config.include LoginMacros, type: :feature
 
+  # Includes omniauth macro
+  config.include(OmniauthMacros)
+
   # Includes support/flash for feature tests
   config.include Flash, type: :feature
 
@@ -63,3 +66,5 @@ RSpec.configure do |config|
     c.syntax = :expect
   end
 end
+
+OmniAuth.config.test_mode = true
diff --git a/spec/support/login_macros.rb b/spec/support/login_macros.rb
index f4608fc5..1bff7302 100644
--- a/spec/support/login_macros.rb
+++ b/spec/support/login_macros.rb
@@ -4,7 +4,7 @@ module LoginMacros
 
     fill_in 'user_email', with: user.email
     fill_in 'user_password', with: user.password
-    find(:xpath, "//div[@id='content']//input[@name='commit']").click
+    find(:xpath, "//div[@id='content']//button[@type='submit']").click
 
     expect(page.has_content?('Signed in successfully')).to be true
   end
diff --git a/spec/support/omniauth_macros.rb b/spec/support/omniauth_macros.rb
new file mode 100644
index 00000000..767e048f
--- /dev/null
+++ b/spec/support/omniauth_macros.rb
@@ -0,0 +1,64 @@
+module OmniauthMacros
+  # The mock_auth configuration allows you to set per-provider (or default)
+  # authentication hashes to return during integration testing.
+
+  def mock_auth_new_user
+    OmniAuth.config.mock_auth[:google] = OmniAuth::AuthHash.new({
+      provider: 'google',
+      uid: 'google-test-uid-1',
+      info: {
+        email: 'test-1@gmail.com'
+      },
+      credentials: {
+        token: 'mock_token',
+        secret: 'mock_secret'
+      }
+    })
+  end
+
+    def mock_auth_new_user_fb
+    OmniAuth.config.mock_auth[:facebook] = OmniAuth::AuthHash.new({
+      provider: 'google',
+      uid: 'facebook-test-uid-1',
+      info: {
+        email: 'test-1@gmail.com'
+      },
+      credentials: {
+        token: 'mock_token',
+        secret: 'mock_secret'
+      }
+    })
+  end
+
+  def mock_auth_existing_user_participant
+    # The mock_auth configuration allows you to set per-provider (or default)
+    # authentication hashes to return during integration testing.
+    OmniAuth.config.mock_auth[:google] = OmniAuth::AuthHash.new({
+      provider: 'google',
+      uid: 'google-test-uid-participant-1',
+      info: {
+        email: 'test-participant-1@google.com'
+      },
+      credentials: {
+        token: 'mock_token',
+        secret: 'mock_secret'
+      }
+    })
+  end
+
+  def mock_auth_existing_user_admin
+    # The mock_auth configuration allows you to set per-provider (or default)
+    # authentication hashes to return during integration testing.
+    OmniAuth.config.mock_auth[:google] = OmniAuth::AuthHash.new({
+      provider: 'google',
+      uid: 'google-test-uid-admin-1',
+      info: {
+        email: 'test-admin-1@google.com'
+      },
+      credentials: {
+        token: 'mock_token',
+        secret: 'mock_secret'
+      }
+    })
+  end
+end
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