可以使用哪些事件代替Google聊天的“ DeprecatedEvent”

Question

I have several questions related to google.golang.org/api/chat/v1.

1. It seems the only available Event object is DeprecatedEvent. So, what is the non-deprecated one to use?

2. If DeprecatedEvent is indeed the intended one to use, inside the DeprecatedEvent object, there's a User *User field. However, it seems that the User object is different from what I actually got from the responses.

For example:

{
  'eventTime': '2019-08-27T06:50:12.391141Z',
  'user': {
    'name': 'users/112...',
    'email': 'iskandar.setiadi@...',
    'avatarUrl': 'https://lh3.googleusercontent.com/a-/AAu...',
    'displayName': 'Iskandar Setiadi',
    'type': 'HUMAN'
  },
  'type': 'ADDED_TO_SPACE',
  'space': {
    'name': 'spaces/7ag...',
    'type': 'DM'
  }
}

In the API, User object only contains displayName, name, and type. It seems that email and avatarUrl are not there. Is v1 outdated or is there any alternatives that I don't know?