Devise.setup do |config|
  
  ...

   # These oauth key and secret are use for localhost. Please replace them if necessary
   config.omniauth :github, 'a55eb780a5a66bc2fabe', 'b531490bdcc4fcbb3e05bdca2e75e60b8ad9ba12'
   config.omniauth :facebook, "283956394958478", "fdfedf11fba5c4e77e87a748aad36cc9"
   config.omniauth :google_oauth2, '950211539633-6sh58gmv2mc39jn8m6b6uo9i5po6qkjh.apps.googleusercontent.com', 'pvDaViwlfKROcMTxhauo76Gu'
   #config.omniauth :twitter, "xfOsUPR6WPYzs3EXBbrag", "jxWQdnKr0KnzteXZHbVaE2JtbE6PzuKjOs9PnkeEag"
end