Add a relationship between a user and links.

priv/repo/migrations/20240901105600_add_relationship_between_users_and_links.exs

@@ -0,0 +1,11 @@
+defmodule LinkShortener.Repo.Migrations.AddRelationshipBetweenUsersAndLinks do
+  use Ecto.Migration
+
+  def change do
+    alter table(:links) do
+      add :user_id, references(:users, on_delete: :delete_all), null: false
+    end
+
+    create index(:links, [:user_id])
+  end
+end