test sessions controller and fix style

app/controllers/sessions_controller.rb

@@ -1,10 +1,6 @@
 # frozen_string_literal: true
 
 class SessionsController < ApplicationController
-  # GET /users/login
-  def new
-  end
-
   # GET /users/logout
   def destroy
     logout
@@ -14,7 +10,7 @@ class SessionsController < ApplicationController
   # POST /users/login
   def create
     user = User.find_by(email: session_params[:email])
-    if user.&authenticate(session_params[:password])
+    if user&.authenticate(session_params[:password])
       login(user)
     end
   end
@@ -35,6 +31,9 @@ class SessionsController < ApplicationController
   def omniauth
     user = User.from_omniauth(request.env['omniauth.auth'])
     login(user)
+  rescue => e
+    logger.error "Error authenticating via omniauth: #{e}"
+    redirect_to root_path
   end
 
   # POST /auth/failure