function updateAvatar(
  cts: nkruntime.Context,
  logger: nkruntime.Logger,
  nk: nkruntime.Nakama,
  payload: string
) {
  try {
    const { avatarUrl } = JSON.parse(payload);
    const userId = cts.userId;

    // logger.debug("incoming payload avatarToUpdate data: ", avatarToUpdate);

    nk.accountUpdateId(userId, null, null, null, null, null, avatarUrl);

    const updatedUser = nk.usersGetId([userId]);
    return JSON.stringify({
      userId: updatedUser[0].userId,
      avatarUrl: updatedUser[0].avatarUrl,
    });
  } catch (error) {
    logger.error("Failed to update account.", error);
    return JSON.stringify({
      message: "Failed to update account.",
      code: nkruntime.Codes.INTERNAL,
    });
  }
}