Hi Kuznetsov,
Thank you for reaching out. I’m not sure if you sent out the invitation via API or the Google Ads UI. However, if the client has not received the email you could definitely extend the invitation again via API or UI. You could refer to this guide on how to extend the invitation to link the customer account via the Adwords API.
Thanks and regards,
Xiaoming, Google Ads API Team
Hi Vlad,
Thank you for reaching out. You could just repeat the process to send out the invitation one more time and check if the user receives it in their email address.
Thanks and regards,
Xiaoming, Google Ads API Team