is_default as the primary identity.{
"auth_provider": "string",
"auth_provider_user_id": "string",
"email": "string",
"email_verified": true,
"id": "497f6eca-6276-4993-bfeb-53cbbbba6f08",
"is_default": true,
"linked_at": "2019-08-24T14:15:22.123Z",
"profile_id": "bfcb6779-b1f9-41fc-92d7-88f8bc1d12e8"
}