Notify admins when a approval/invite user signs up

test/mailers/previews/user_mailer_preview.rb

@@ -35,4 +35,18 @@ class UserMailerPreview < ActionMailer::Preview
     user = User.first
     UserMailer.approve_user(user, "http://example.com/", @logo, @color)
   end
+
+  # Preview this email at
+  # http://localhost:3000/rails/mailers/user_mailer/approval_user_signup
+  def approval_user_signup
+    user = User.first
+    UserMailer.approval_user_signup(user, "http://example.com/", @logo, @color, "test@example.com")
+  end
+
+  # Preview this email at
+  # http://localhost:3000/rails/mailers/user_mailer/invite_user_signup
+  def invite_user_signup
+    user = User.first
+    UserMailer.invite_user_signup(user, "http://example.com/", @logo, @color, "test@example.com")
+  end
 end