Manipulate email notification setting for user when they register for buddypress/buddyboss

buddypress-email-setting-manipulation.php

<?php

function bpdev_set_email_notifications_preference( $user_id ) {
	//I am putting some notifications to no by default and the common ones to yes to enable it.
	//ref. https://bp-tricks.com/snippets/changing-default-buddypress-notifications-settings and BP forum
	$settings_keys = array(
	'notification_activity_new_mention' => 'yes',
	'notification_activity_new_reply' => 'yes',
	'notification_friends_friendship_request' => 'no',
	'notification_friends_friendship_accepted' => 'no',
	'notification_groups_invite' => 'no',
	'notification_groups_group_updated' => 'no',
	'notification_groups_admin_promotion' => 'no',
	'notification_groups_membership_request' => 'no',
	'notification_messages_new_message' => 'yes',
	);
	foreach( $settings_keys as $setting => $preference ) {
	bp_update_user_meta( $user_id, $setting, $preference );
	}
}

add_action( 'user_register', 'bpdev_set_email_notifications_preference');