36      * Get all users in a group
38      * @param string $group
41     public function getGroupUsers($group)  argument
46             if (in_array($group, $groups)) {
55      * Get the configuration by group
57      * @return array [group => [user1, user2, ...], ...]
64             foreach ($usergroups as $group) {
65                 if (!isset($groups[$group])) {
66                     $groups[$group] = [];
68                 $groups[$group][] = $user;
75     // region individual user/group management
125      * Remove a group from all users
127      * @param string $group
130     public function removeGroup($group)  argument
134             if (($key = array_search($group, $groups)) !== false) {
142      * Add one or more users to a group
144      * @param string $group
148     public function addUsersToGroup($group, $users)  argument
155             $config[$user][] = $group;
161     public function setGroupUsers($group, $users)  argument
168             $config[$user][] = $group;
194 …        $groups = array_map(static fn($group) => rawurldecode(trim($group)), explode(',', $value));
218                 implode(',', array_map(static fn($group) => auth_nameencode($group), $groups));
223             msg('Failed to save virtual group configuration', -1);