WP_REST_Taxonomies_Controller::get_items_permissions_check() WordPress Method

	public function get_items_permissions_check( $request ) {
		if ( 'edit' === $request['context'] ) {
			if ( ! empty( $request['type'] ) ) {
				$taxonomies = get_object_taxonomies( $request['type'], 'objects' );
			} else {
				$taxonomies = get_taxonomies( '', 'objects' );
			}

			foreach ( $taxonomies as $taxonomy ) {
				if ( ! empty( $taxonomy->show_in_rest ) && current_user_can( $taxonomy->cap->assign_terms ) ) {
					return true;
				}
			}

			return new WP_Error(
				'rest_cannot_view',
				__( 'Sorry, you are not allowed to manage terms in this taxonomy.' ),
				array( 'status' => rest_authorization_required_code() )
			);
		}

		return true;
	}