When I have a user resource and an associated post resource.
I want the user_id to be automatically included in the post
when I log in and create a post with token. How is this possible?

For your information, I am using ash_graphql.

I would like to send a request when I create a post with a token that was created when I log in and I would like to be able to identify the user in the post through that token.

user

defmodule Dentallog.Accounts.User do
  use Ash.Resource,
    data_layer: AshPostgres.DataLayer,
    extensions: [
      AshAuthentication]
...
authentication do
    api Dentallog.Accounts

    strategies do
      password :password do
        identity_field(:email)
        hashed_password_field(:hashed_password)
        sign_in_tokens_enabled?(true)

        resettable do
          sender(Dentallog.Accounts.User.Senders.SendPasswordResetEmail)
        end
      end
    end
 

post

create :create do
      argument :photos, {:array, :map}, allow_nil?: true
      argument :hashtags, {:array, :map}, allow_nil?: true
      argument :category_id, :uuid

      change set_attribute(:dental_lab_category_id, arg(:category_id))

      change manage_relationship(:photos, type: :create)
      change manage_relationship(:hashtags, type: :create)
 end

...
relationships do
    belongs_to :user, Dentallog.Accounts.User do
      api Dentallog.Accounts
end