addAdmins function 
 
    
    
    
  Implementation
  Future<GroupInfoDTO?> addAdmins({
  required String chatId,
  String? account,
  Signer? signer,
  String? pgpPrivateKey,
  required List<String> admins,
}) async {
  account ??= getCachedWallet()?.address;
  signer ??= getCachedWallet()?.signer;
  pgpPrivateKey ??= getCachedWallet()?.pgpPrivateKey;
  try {
    if (account == null && signer == null) {
      throw Exception('At least one from account or signer is necessary!');
    }
    if (admins.isEmpty) {
      throw Exception("Admin address array cannot be empty!");
    }
    return push.updateGroupMembers(
      chatId: chatId,
      signer: signer,
      pgpPrivateKey: pgpPrivateKey,
      account: account,
      upsert: UpsertDTO(admins: admins),
    );
  } catch (e) {
    log("[Push SDK] - API  - Error - API addAdmins -: $e ");
    rethrow;
  }
}