joinGroup(inviteURI<s>) -> <>::
* inviteURI : String starting with https://signal.group/#
-If the link requires admin approval, this adds you to the requesting members list. Otherwise, this adds you to the pending members list.
+Behavior of this method depends on the `requirePermission` parameter of the `enableLink` method. If permission is required, `joinGroup` adds you to the requesting members list. Permission may be granted based on the group's `PermissionAddMember` property (`ONLY_ADMINS` or `EVERY_MEMBER`). If permission is not required, `joinGroup` admits you immediately to the group.
Exceptions: Failure
addAdmins(recipients<as>) -> <>::
* recipients : String array of phone numbers
-Grant admit privileges to recipients.
+Grant admin privileges to recipients.
Exceptions: Failure