To join a private group, you will need a member of that group to invite you or share the group with you.
A group member can send you an invitation to join the group using an invitation QR code or the group’s PIN. Or they can share the group with you in a private chat or another group. Or they can invite you to the group via email, Facebook, etc.
To read about the different options for inviting new members to a group, you can click here:
If you receive a QR code or group PIN, you can go to the “Chat” page and click on the “+” icon in the top right corner. You will see the options to “Enter Group PIN” or “Scan QR Code.”
If someone shares a group with you, you can then view the group details and click on “Join” if you want to join the group.