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?