fetchUserInfo method
根据accountId,远程拉取用户信息
Implementation
@override
Future<List<NIMUser>?> fetchUserInfo(List<String> accountList) async {
var res = await NimCore.instance.userService.fetchUserInfoList(accountList);
if (res.isSuccess && res.data != null) {
return res.data;
}
return null;
}