How to delegate a connection to a PayPal site to a developer?

Question

PayPal

Hello, We decided to connect PayPal to the site, but neither the customer nor the developer knows how to properly give the developer the opportunity to work with the task without giving the developer access to the customer's PauPal account.
Docks read, even more confused. If someone has such experience, please kindly suggest how to properly delegate the task of integrating PayPal to the developer.

Answer 1

Create a similar account on PayPal, give it to the developer. When he writes the integration, in production you change the secret of Kay to your own.

Answer 2

firstly, paypal has a sandbox - for developers
and secondly - then change the keys and that's it