Add interface to create and update user accounts

app/controllers/users_controller.rb

@@ -0,0 +1,55 @@
+class UsersController < ApplicationController
+  def new
+    @user=User.new
+  end
+
+  def create
+    @user=User.new(user_params)
+    if @user.save
+      render 'show'
+    else
+      redirect_to new_user_path
+    end
+  end
+
+  def edit
+    @user = User.find(params[:id])
+  end
+
+  def update
+    @user = User.find(params[:id])
+    attrs = user_params
+    respond_to do |format|
+      if @user.update(attrs)
+        flash[:notice] = 'Konto wurde erfolgreich aktualisiert.'
+        format.html { redirect_to user_url(@user) }
+        format.xml  { head :ok }
+      else
+        format.html { render :action => "edit" }
+        format.xml  { render :xml => @user.errors.to_xml }
+      end
+    end
+  end
+
+  def show
+    @user = User.find_by_id(params[:id])
+  end
+
+  def index
+    @users = User.all
+  end
+
+  def destroy
+    @user = User.find(params[:id])
+    @user.destroy
+    respond_to do |format|
+      format.html { redirect_to users_url }
+      format.xml  { head :ok }
+    end
+  end
+
+  private
+  def user_params
+    params.require(:user).permit(:email, :password)
+  end
+end