If your exchange API keys expire (such as on Huobi every 90 days) or when you may experience an error message, such as "Invalid API Keys", the best solution is to update your saved API keys for the linked exchange account.
It is really important that you update your existing connection and you don't connect it as a new exchange account to 3Commas. If you add the same exchange account as a new linked exchange and delete the old connection in 3Commas, you'll lose your trading history and will disrupt active trades you may have open!
Also, the following errors will require you to update your linked exchange account with a new API:
Exchange account is banned.
API key is invalid
API keys are no longer valid or incorrect
First, create a new API using the exchange's website
Check here to find a guide for your exchange, if you don't know (or remember) how to do this:
Then, edit the linked exchange account on 3Commas
Open My Exchanges, and find the account you want to update. Your accounts are below the "connect new exchange" and "Information / Summary" sections on the page, scroll the page down if required. Here's how a connected exchange account looks:
Click the edit button:
Copy your new API Key and API Secret
Don't forget to update both. You also should update the passphrase, if your exchange requires this, too.
Finish by pressing the save button.
Have any issues? Check possible ways to fix.