rubocop corrections

app/controllers/sessions_controller.rb

@@ -1,23 +1,18 @@
+# frozen_string_literal: true
+
+# Sessions controller
 class SessionsController < ApplicationController
-  def new
-  end
+  def new; end
 
   def create
     @user = User.find_by(email: params[:email])
-    unless @user
-      redirect_to '/welcome', notice: 'Wrong email address'
-      return
+    problem = problem_with_login
+    if problem
+      redirect_to '/welcome', notice: problem
+    else
+      session[:user_id] = @user.id
+      redirect_to '/welcome'
     end
-    unless @user.authenticate(params[:password])
-      redirect_to '/welcome', notice: 'Wrong password'
-      return
-    end
-    if @user.blocked?
-      redirect_to '/welcome', notice: 'You are blocked, please contact support'
-      return
-    end
-    session[:user_id] = @user.id
-    redirect_to '/welcome'
   end
 
   def delete
@@ -25,6 +20,17 @@ class SessionsController < ApplicationController
     redirect_to '/welcome', notice: 'Logged out properly'
   end
 
-  def welcome
+  def welcome; end
+
+  private
+
+  def problem_with_login
+    if !@user
+      'Wrong email address'
+    elsif !@user.authenticate(params[:password])
+      'Wrong password'
+    elsif @user.blocked?
+      'You are blocked, please contact support'
+    end
   end
 end