WP_REST_Taxonomies_Controller::get_item_permissions_check() WordPress Method

	public function get_item_permissions_check( $request ) {

		$tax_obj = get_taxonomy( $request['taxonomy'] );

		if ( $tax_obj ) {
			if ( empty( $tax_obj->show_in_rest ) ) {
				return false;
			}

			if ( 'edit' === $request['context'] && ! current_user_can( $tax_obj->cap->assign_terms ) ) {
				return new WP_Error(
					'rest_forbidden_context',
					__( 'Sorry, you are not allowed to manage terms in this taxonomy.' ),
					array( 'status' => rest_authorization_required_code() )
				);
			}
		}

		return true;
	}