How can I get all results concatenated from a column group by UID?

I need to build a SQL query, for MySQL 5.7, if it is possible, to "GROUP BY" uid and title and concat the permissions column and separate with a |? I am saying GROUP BY but I do not know if that is the right term here.

+------+--------+------------------------------------------------+
| uid  | title  | permissions                                    |
+------+--------+------------------------------------------------+
| 1438 | Delete | /_permission_set.php|/process.php|/command.php |
+------+--------+------------------------------------------------+
| 1438 | Remove | /_permission_set.php|/process.php|/command.php |
+------+--------+------------------------------------------------+

I have tried the following SQL (as you can see in this DBFiddle ) but it did not work

SELECT uid, CONCAT('|', permissions)
FROM some_table
WHERE uid=1438
GROUP BY uid, permissions;