Open Liquid main menu using icon (Avatar) in the top-right of the Liquid dashboard.
Navigate to Security > API Tokens.
Click Create a New Token.
Select the permissions for the new API token and input a 2FA code, then click Create Token.
The newly created API token will be displayed in the Manage API Tokens section.
Note that the Token Secret (redacted in the screenshot) is displayed once only so you'll need to make a backup.