pleroma/priv/repo/migrations/20210122151424_add_last_active_at_to_users.exs

defmodule Pleroma.Repo.Migrations.AddLastActiveAtToUsers do
  use Ecto.Migration

  def change do
    alter table(:users) do
      add(:last_active_at, :naive_datetime)
    end

    create_if_not_exists(index(:users, [:last_active_at]))
  end
end