Download the Postman Collection for your application from the dashboard:
Go to the Yapily Dashboard > 'My Applications'
Select the application you wish to connect to Postman
Select the 'Tools' tab
Select 'Download Postman Collection'
Import the Postman Collection:
Either drag or upload the Postman Collection
Configure the Collection:
Click the menu button (•••) for your imported collection
Under the variables tab, replace the value of the application-secret with the application-secret in the credentials file you downloaded when creating the application.
You can also set the value of the institution-id to the ID of the institution that you added when you added a live bank or added a pre-configured sandbox. This is visible in the dashboard on the institution tab of your application: