Added new function

app/controllers/sessions_controller.rb

 class SessionsController < ApplicationController
 class SessionsController < ApplicationController
   def new
   def new
+    redirect_to @current_user if logged_in?
   end
   end
 
 
   def create
   def create
-    user = User.find_by(email: params[:session][:email].downcase)
+    user = User.find_by(  email: params[:session][:email].downcase)
     if user && user.authenticate(params[:session][:password])
     if user && user.authenticate(params[:session][:password])
       log_in user
       log_in user
       redirect_to user
       redirect_to user