1. Click on "Settings"
  2. Click on "Brands"
  3. Select your brand
  4. Click on "General"
  5. Enter the name of the person you want to invite in the field.
  6. tyl.io will automatically suggest usernames corresponding to what you're typing.
  7. Select the person's username.

If you do not find the username of the people you're looking for, it means that they have not yet created an account with tyl.io. Just invite them to register by following these instructions.