In order to auto-connect your FTX US exchange account to CoinStats, please follow the steps described below.
First, go to the FTX US webpage and log in to your account. Click on your email address on the top right and select API.

Scroll down the screen, and click on the Create API Key button.

Once the key is generated, a new window will appear with the API key and secret. Make sure to save the API Secret, as it will be hidden after you close the window.

Now go to your CoinStats account and follow the below steps:
Web
Go to the Portfolio Tracker
Click on Connect Portfolio on the left
Search for FTX US
Paste the API key and Secret in the respective fields
Click on Connect button

Mobile
Go to the Portfolio tab
Tap on the + button on the left side of the screen
Tap on the Connect Other and search FTX US
Input the API Key and Secret and click Submit

Congratulations! You've now successfully connected your FTX US to the CoinStats!