Managing many_to_many relationships with AshPhoenix.Form

create :create do
  accept [:name]
  argument :users, {:array, :map}
  change manage_relationship(:users,
           on_lookup: :relate,
           on_no_match: :error,
           on_match: :ignore,
           on_missing: :error
         )
end

      <.form for={@form} id="organizations-form" phx-change="validate" phx-submit="save">
        <%= if @form.source.type == :create do %>
          <.input
            field={@form[:users]}
            type="select"
            multiple
            label="Users"
            options={[]}
          />
          <.input field={@form[:name]} type="text" label="Name" />
        <% end %>