public function get_collection_params() {
		$params = array_intersect_key(
			parent::get_collection_params(),
			array(
				'context'  => true,
				'page'     => true,
				'per_page' => true,
				'search'   => true,
			)
		);

		$params['type'] = array(
			'description'       => __( 'Shorthand for certain orderby/order combinations.', 'buddypress' ),
			'default'           => 'newest',
			'type'              => 'string',
			'enum'              => array( 'active', 'newest', 'alphabetical', 'random', 'online', 'popular' ),
			'sanitize_callback' => 'sanitize_key',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['user_id'] = array(
			'description'       => __( 'Limit results to friends of a user.', 'buddypress' ),
			'default'           => 0,
			'type'              => 'integer',
			'sanitize_callback' => 'absint',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['user_ids'] = array(
			'description'       => __( 'Pass IDs of users to limit result set.', 'buddypress' ),
			'default'           => array(),
			'type'              => 'array',
			'items'             => array( 'type' => 'integer' ),
			'sanitize_callback' => 'wp_parse_id_list',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['include'] = array(
			'description'       => __( 'Ensure result set includes specific IDs.', 'buddypress' ),
			'default'           => array(),
			'type'              => 'array',
			'items'             => array( 'type' => 'integer' ),
			'sanitize_callback' => 'wp_parse_id_list',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['exclude'] = array(
			'description'       => __( 'Ensure result set excludes specific IDs.', 'buddypress' ),
			'default'           => array(),
			'type'              => 'array',
			'items'             => array( 'type' => 'integer' ),
			'sanitize_callback' => 'wp_parse_id_list',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['member_type'] = array(
			'description'       => __( 'Limit results set to certain type(s).', 'buddypress' ),
			'default'           => array(),
			'type'              => 'array',
			'items'             => array( 'type' => 'string' ),
			'sanitize_callback' => 'bp_rest_sanitize_string_list',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['xprofile'] = array(
			'description'       => __( 'Limit results set to a certain XProfile field.', 'buddypress' ),
			'default'           => '',
			'type'              => 'string',
			'sanitize_callback' => 'sanitize_key',
			'validate_callback' => 'rest_validate_request_arg',
		);

		/**
		 * Filters the collection query params.
		 *
		 * @param array $params Query params.
		 */
		return apply_filters( 'bp_rest_members_collection_params', $params );
	}