Start receiving stream from iqoption.com ...
ERROR:root:error get_candles need reconnect
ERROR:root:error get_candles need reconnect
ERROR:root:error get_candles need reconnect
ERROR:root:error get_candles need reconnect

2020-12-05 20:52:45,387 Websocket client connected.
2020-12-05 20:52:45,402 POST: https://auth.iqoption.com/api/v2/login headers: {'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.139 Safari/537.36', 'Accept-Encoding': 'gzip, deflate', 'Accept': '/', 'Connection': 'keep-alive'} cookies: {}
2020-12-05 20:52:45,404 Starting new HTTPS connection (1): auth.iqoption.com:443
2020-12-05 20:52:46,014 {"name":"timeSync","msg":1607181766119}
2020-12-05 20:52:46,015 {"name":"heartbeat","msg":1607181766119}
2020-12-05 20:52:46,273 <Response [401]>
2020-12-05 20:52:46,274 {"code":"invalid_credentials","message":"You entered the wrong credentials. Please check that the login/password is correct."}
2020-12-05 20:52:46,274 {'Server': 'nginx', 'Date': 'Sat, 05 Dec 2020 15:22:46 GMT', 'Content-Type': 'application/json; charset=utf-8', 'Content-Length': '126', 'Connection': 'keep-alive', 'Vary': 'Origin', 'X-Tracing-Key': '9571cde3-829d-4074-93d2-d593f8147aae'}
2020-12-05 20:52:46,274 <RequestsCookieJar[]>
2020-12-05 20:52:46,468 Websocket connection closed.
Start getting candles ... ============================>
2020-12-05 20:52:46,470 error get_candles need reconnect
2020-12-05 20:52:47,482 Websocket client connected.
2020-12-05 20:52:47,497 POST: https://auth.iqoption.com/api/v2/login headers: {'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.139 Safari/53

Currently more than one connection is not allowed for single worker, which is a critical issue.
Should be resolved for a practical use.