public function create_item( $request ) {

		if ( ! empty( $request['id'] ) ) {
			return llms_rest_bad_request_error( __( 'Cannot create an existing resource.', 'lifterlms' ) );
		}

		$schema = $this->get_item_schema();

		$item = $this->prepare_item_for_database( $request );
		// Exclude additional fields registered via `register_rest_field()`.
		$item   = array_diff_key( $item, $this->get_additional_fields() );
		$object = $this->create_object( $item, $request );
		if ( is_wp_error( $object ) ) {
			return $object;
		}

		$this->object_inserted( $object, $request, $schema, true );

		// Registered via `register_meta()`.
		$meta_update = $this->update_meta( $object, $request, $schema );
		if ( is_wp_error( $meta_update ) ) {
			return $meta_update;
		}

		// Registered via `register_rest_field()`.
		$fields_update = $this->update_additional_fields_for_object( $object, $request );
		if ( is_wp_error( $fields_update ) ) {
			return $fields_update;
		}

		$this->object_completely_inserted( $object, $request, $schema, true );

		$request->set_param( 'context', 'edit' );

		$response = $this->prepare_item_for_response( $object, $request );

		$response->set_status( 201 );
		$response->header( 'Location', rest_url( sprintf( '%s/%s/%d', $this->namespace, $this->rest_base, $this->get_object_id( $object ) ) ) );

		return $response;
	}