custom-tax.php

<?php
		register_taxonomy(
			'members_tax',
			'post',
			array(
				'label'             => __( 'Members' ),
				'hierarchical'      => true,
				'rewrite'           => array( 'slug' => 'members-tax' ),
				'capabilities'      => array(
					'assign_terms' => 'manage_options',
					'edit_terms'   => 'god',
					'manage_terms' => 'god',
				),
				'show_in_nav_menus' => false,
			)
		);