edit authors, delete users, UI changes

app/controllers/authors_controller.rb

@@ -1,5 +1,28 @@
 class AuthorsController < ApplicationController
+  before_action :ensure_admin
+  before_action :set_author, only: [:edit, :update]
+
   def index
     @authors = Author.all
   end
+
+  def edit
+    @author = Author.find(params[:id])
+  end
+
+  def update
+    if @author.update(author_params)
+      redirect_to '/authors'
+    end
+  end
+
+  private
+
+  def set_author
+    @author = Author.find(params[:id])
+  end
+
+  def author_params
+    params.require(:author).permit(:first_name, :last_name)
+  end
 end