database updated to create domain crendtial references

db/migrate/20260427123300_create_domains_admins.rb

@@ -0,0 +1,8 @@
+class CreateDomainsAdmins < ActiveRecord::Migration[8.1]
+  def change
+    create_table :domains_admins, id: false do |t|
+      t.belongs_to :users
+      t.belongs_to :domains
+    end
+  end
+end