Go to https://eu.jotform.com/and log in to your account.
Go to your account settings by clicking on the profile picture in the right-hand corner of the page and choosing settings.
This will take you to the Settings page. On the left-hand side of the page, there is a menu. Click on API found at the bottom of the menu.
This will take you to the API page. Click on Create New Key, found at the bottom of the API KEYs table.
This will create a new line in the API KEYS table. You can change the name of the key and the access level.