Question (People API) : by query of "other contacts", how can I get other fields of them (photos, coverPhotos, etc...) ?

Using `OtherContacts.list()`, I succeeded to get a list of `Person` instances there (relevant link [here](https://developers.google.com/people/api/rest/v1/otherContacts/list) and [here ](https://developers.google.com/people/api/rest/v1/people#Pe)), but as the API says, I can only request to
fetch this information:

"emailAddresses,names,phoneNumbers"

How can I get the rest? Is there even an ID for each item here (had it for Contacts API [here](https://developers.google.com/contacts/v3#retrieving_contacts_using_query_parameters) ) ?
Is there perhaps a workaround to get the rest of the fields for each item of the list here?

Start with the linked People API documentation and the OtherContacts.list() entry point, especially the Person fields and supported request fields named in the issue. Determine whether other contacts have usable IDs and whether additional fields can be requested; done means providing a documented answer or confirmed limitation and any supported workaround.

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