I am working on a flow to sync contacts between a small CRM solution and Google Contacts, so added / updated contacts in the system are created / updated in Google Contacts.
But the existing app only supports searching by name and email, while the most important key for the customer is the phone number (and I believe it goes for most users of Google Contacts syncing their Android contacts to Google).
So, how can I find people in Google Contacts using the phone number without using the Google People API directly?