How do I access the Sandbox account associated with my REST API test credentials?

Here's how:

1. Log in to your PayPal Developer account.
2. Click Dashboard.
3. Click Accounts under Sandbox.
4. Click the email address of the business account you specified in your application.
5. Click Profile.
6. Click Profile on the Account details page.
   Note: The default password is "11111111." However, you can click Change Password to set a different password for this account.
7. Check the box next to the business account whose credentials you're checking, then click Enter Sandbox site.
8. Log in to that Sandbox business account.