The PayPaga API uses OAuth2.0 to authorize requests. Credentials are available in the Developer's section in the Merchant Portal. The Merchant Portal for each environment, Sandbox and Production, contains unique credentials.Your credentials carry many privileges, so be sure to keep them secure! Do not share your client identifier or client secret in publicly accessible areas such as GitHub, client-side code, and so forth.All API requests must be made over HTTPS. Calls made over plain HTTP will fail. API requests without authentication will also fail.