If you want to integrate different JS for different environment or you have an agency where you want to have multiple projects mapped to multiple users, you can add a project in your own account. This will give you a new JS code to be integrated on different environments or websites.
Go to "Account" page from left panel
Under "Team" tab, you should be able to see an "Add Project" button
Click on "Add New Project" button to start creating a new project
Once you will click "Add New Project", a modal will open where you can just click "Create New Project"
You will find a snippet for your new project in the modal
You can switch from one project to another from top left corner as shown below