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fetchBalance from Kucoin for sub-account returns nothing

See original GitHub issue

OS: Ubuntu
Programming Language version: nodejs
CCXT version: 1.73.49

  async getBalance(id: ObjectID): Promise<any> {
    const bot = await this.findOne(id);
    const criteria: any = {
      apiKey: bot.apiKey,
      secret: bot.secret,
    };
    if (_.keys(bot.headers).length > 0) {
      criteria.headers = bot.headers;
    }
    if (bot.password) {
      criteria.password = bot.password;
    }

    // console.log(criteria);
    const balance = await this.exchangesService.getBalance(
      bot.exchangeClassName.toLowerCase() as ExchangeId,
      criteria,
    );
    console.log(balance);
    return balance;
  }
  
 // ExchangeService
 
  async getBalance(exchangeId: ExchangeId, criteria: any) {

    const ex = this.instantiateExchange(exchangeId, criteria)

    const balance = await ex.fetchBalance();

    return balance
  }
  
  private instantiateExchange(id: ExchangeId, criteria?: any) {

    return new ccxt[id]({
      timeout: 30000,
      enableRateLimit: true,
      ...(criteria || {})
    });
  }

// Sub-account
{
  info: { code: '200000', data: [] },
  timestamp: undefined,
  datetime: undefined,
  free: {},
  used: {},
  total: {}
}
// Main-account
{
  info: {
    code: '200000',
    data: [
      [Object], [Object], [Object], [Object], [Object], [Object],
      [Object], [Object], [Object], [Object], [Object], [Object],
      [Object], [Object], [Object], [Object], [Object], [Object],
      [Object], [Object], [Object], [Object], [Object], [Object],
      [Object], [Object], [Object], [Object], [Object], [Object],
      [Object], [Object], [Object], [Object], [Object], [Object],
      [Object], [Object], [Object], [Object], [Object], [Object],
      [Object], [Object], [Object], [Object], [Object], [Object],
      [Object], [Object], [Object], [Object], [Object], [Object],
      [Object], [Object], [Object], [Object], [Object], [Object],
      [Object], [Object], [Object], [Object], [Object], [Object],
      [Object], [Object], [Object], [Object], [Object], [Object],
      [Object], [Object], [Object], [Object], [Object], [Object],
      [Object], [Object], [Object], [Object], [Object], [Object],
      [Object], [Object], [Object], [Object]
    ]
  },
  timestamp: undefined,
  datetime: undefined,
  // .....