Installed authentication-zero

app/controllers/identity/emails_controller.rb

@@ -0,0 +1,36 @@
+class Identity::EmailsController < ApplicationController
+  before_action :set_user
+
+  def edit
+  end
+
+  def update
+    if @user.update(user_params)
+      redirect_to_root
+    else
+      render :edit, status: :unprocessable_entity
+    end
+  end
+
+  private
+    def set_user
+      @user = Current.user
+    end
+
+    def user_params
+      params.permit(:email, :password_challenge).with_defaults(password_challenge: "")
+    end
+
+    def redirect_to_root
+      if @user.email_previously_changed?
+        resend_email_verification
+        redirect_to root_path, notice: "Your email has been changed"
+      else
+        redirect_to root_path
+      end
+    end
+
+    def resend_email_verification
+      UserMailer.with(user: @user).email_verification.deliver_later
+    end
+end