edit authors, delete users, UI changes

app/controllers/users_controller.rb

@@ -1,4 +1,10 @@
 class UsersController < ApplicationController
+  before_action :ensure_admin, only: [:destroy]
+
+  def index
+    @users = User.all
+  end
+
   def new
     @user = User.new
   end
@@ -45,4 +51,9 @@ class UsersController < ApplicationController
       redirect_to '/welcome', notice: 'Recovery link expired or invalid'
     end
   end
+
+  def destroy
+    User.destroy(params[:id])
+    redirect_to '/users'
+  end
 end