explicitly call #omniauth_fail

app/controllers/sessions_controller.rb

@@ -25,10 +25,11 @@ class SessionsController < ApplicationController
     login(user)
   rescue => e
     logger.error "Error authenticating via omniauth: #{e}"
+    omniauth_fail
   end
 
   # POST /auth/failure
-  def fail
+  def omniauth_fail
     redirect_to root_path, notice: I18n.t(params[:message], default: I18n.t("omniauth_error"))
   end
 

config/routes.rb

@@ -26,7 +26,7 @@ Rails.application.routes.draw do
 
   # Handles Omniauth authentication.
   match '/auth/:provider/callback', to: 'sessions#omniauth', via: [:get, :post], as: :omniauth_session
-  get '/auth/failure', to: 'sessions#fail'
+  get '/auth/failure', to: 'sessions#omniauth_fail'
 
   # Room resources.
   resources :rooms, only: [:create, :show, :destroy], param: :room_uid, path: '/'