make deleteaccounts form (staff multiple accounts form) also delete sessions for all accounts deleted

models/forms/deleteaccounts.js

@@ -57,6 +57,11 @@ module.exports = async (req, res, next) => {
 
 	const amount = await Accounts.deleteMany(req.body.checkedaccounts).then(res => res.deletedCount);
 
+	//and delete any of their active sessions
+	await Promise.all(req.body.checkedaccounts.map((username) => {
+		return cache.deletePattern('sess:*:${username}');
+	}));
+
 	return dynamicResponse(req, res, 200, 'message', {
 		'title': 'Success',
 		'message': `${req.body.delete_account ? 'Deleted' : 'Edited'} ${amount} accounts`,