model.diff

diff --git a/app/models/user.rb b/app/models/user.rb
index ca146de..c5d1ac5 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -13,7 +13,7 @@ class User < ApplicationRecord
   after_create :set_admin
 
   def send_to_active_storage
-    self.avatar = StringIO.new(Identicon.blob_for(email))
+    self.avatar.attach(io: StringIO.new(Identicon.blob_for(email)), filename: "#{email}-avatar.png")
   end
 
   private