update :unarchive do
accept [:name, :domain]
change set_attribute(:archived_at, nil)
end
```
and test:
```
test "unarchives an organization" do
organization = Organization
|> Ash.Changeset.for_create(:create, @valid_attrs)
|> Ash.create!()
organization
|> Ash.Changeset.for_destroy(:destroy)
|> Ash.destroy!()
archived_organization = Organization
|> Ash.Query.for_read(:by_id, %{id: organization.id})
|> Ash.read_one!()
IO.inspect(archived_organization, label: "organization xx")
unarchived_organization = archived_organization
|> Ash.Changeset.for_update(:unarchive, @update_attrs)
# |> Ash.update!()
IO.inspect(unarchived_organization, label: "unarchived_organization")
# assert unarchived_organization.id == organization.id
fetched_organization = Organization
|> Ash.Query.for_read(:archived_by_id, %{id: organization.id})
|> Ash.read_one!()
IO.inspect(fetched_organization, label: "fetched XX")
end