Create Leads / User with Phone Number

Hi, I’m not sure if this has been addressed before, I couldn’t find an existing topic. Is there a way to manually create a user or lead in Intercom without entering an email address? I understand we can use either an Email or User ID for new users, but in this case, our agent needs to start a WhatsApp conversation with a lead who doesn’t have an account with us yet. The lead was referred through another channel and has no prior conversation history, so there’s no record in our Intercom database. Since the customer doesn’t have an email, we’re looking to manually create a lead using only their phone number.!--endfragment>!--startfragment>