create separate page for login

app/controllers/sessions_controller.rb

@@ -15,6 +15,10 @@
 # with BigBlueButton; if not, see <http://www.gnu.org/licenses/>.
 
 class SessionsController < ApplicationController
+
+  def new
+  end
+
   def create
     @user = User.from_omniauth(request.env['omniauth.auth'])
     session[:user_id] = @user.id