python sdk cannot execute successfully

[Pegessi]

this is the code about get klines

class BitgetBot():
    def __init__(self, symbol, interval, start_time, end_time):
        self.marketApi = market.MarketApi(API_KEY, SECRET_KEY, PASS_PHRASE, use_server_time=False, first=True);
        self.publicApi = public.PublicApi(API_KEY, SECRET_KEY, PASS_PHRASE, use_server_time=True, first=False);
        self.symbol = symbol
        self.interval = interval
        self.start_time = start_time
        self.end_time = end_time
    
    def get_coin_klines(self):
        klines = self.marketApi.candles(self.symbol, self.interval, self.start_time, self.end_time, 100)
        print(klines)

if __name__ == '__main__':
    delta = pd.Timedelta(hours=6)
    end_time = pd.Timestamp(datetime.now())
    start_time = end_time-delta
    bot = BitgetBot('BTCUSDT_UMCBL', '300', str(int(start_time.timestamp())), str(int(end_time.timestamp())))
    bot.get_coin_klines()

the infomation:

url: https://api.bitget.com/api/mix/v1/market/candles?symbol=BTCUSDT_UMCBL&granularity=300&startTime=1684893324&endTime=1684914924&limit=100
method: GET
body: 
headers: {'Content-Type': 'application/json', 'ACCESS-KEY': '*****', 'ACCESS-SIGN': *****', 'ACCESS-TIMESTAMP': '***', 'ACCESS-PASSPHRASE': '****'}
response :  []
status: 200
[]

[CadeHalcyon]

I see the same issue - no klines/candlestick data:

payload = {"symbol":"BTCUSDT_UMCBL",
           "granularity": '1H', 
           "startTime":start_time, 
           "endTime":end_time,
           "limit": 100}

r = requests.get("https://api.bitget.com/api/mix/v1/market/candles", params=payload)

print(r.status_code)
print(r.url)
print(r.text)

Output:

200
https://api.bitget.com/api/mix/v1/market/candles?symbol=BTCUSDT_UMCBL&granularity=1H&startTime=1684800000&endTime=1685102856&limit=100
[]