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Description

When authenticated as a user, my app is able to list members and messages in a space, however, user in member or sender is always populated with name and type values as stated in the Google Chat User reference:
if your Chat app authenticates as a user, the output for a User resource only populates the user's name and type.

In other issues, it is suggested to use the People API or Directory API to get the user details with the human user ID. However, this only works if the user if of human type AND (under the same directory/organization as the logged in user OR is a contact of the logged in user).

What if the user is an external user that is not in the authenticated user contacts, say from another organization or is just a personal google account? People API does not return names or emailAddress.
And there is no reference on how to get the name of a bot type user, tried People API but as expected, did not work.

Please include displayName in the response. Or suggest ways to get the displayName that always work, not just in most cases.

Impact

Can only see space member and message sender type and ID, and displayName is not always obtainable from People or Directory API.