Tell me how to obtain a test user in test environment.

Check the information of test user with the following steps:

1. Access PayPay for Developers.

2-a. If you have not log in to PayPay for Developers, press the "Sign In" or "Sign up" button to log in.

2-b. If you have already logged in to PayPay for Developers, press the "Dashboard" button to open the Dashboard screen.

3. Click "Test User" on the Dashboard screen.

Three (3) test users are available per account. Their password can be checked by clicking respective eye icons.