16.22. The programmers are requesting for the unique_id and sign_pasword parameters. Where can I find them?

The unique_id parameter is the client's unique number.

The project_id parameter is the number of the project, which can be found in Payment gateway > Manage projects. The ID is provided next to the project.

The sign_password parameter can be found in Payment gateway > Manage projects by clicking on Project settings > General project settings.