| Procedure | Screenshot | |
|---|---|---|
| 1. Get or prepare the contact list in Google Sheet | ![]() | |
| 2. Copy all the email address from the Google Sheet |
| |
| 3. At Challenge wizard, select Audience, click on "Add Users by mail" | ![]() | |
| 4. Paste (CTRL + V) in text box , click on "Subscribe" | ![]() | |
| 5. You can see the people are invited | ![]() |