Add snowflake IDs

priv/repo/migrations/20250530110822_create_users.exs

@@ -2,7 +2,8 @@ defmodule Nulla.Repo.Migrations.CreateUsers do
   use Ecto.Migration
 
   def change do
-    create table(:users) do
+    create table(:users, primary_key: false) do
+      add :id, :bigint, primary_key: true
       add :username, :string, null: false, unique: true
       add :email, :string
       add :password, :string