DocuSign

Go to the Apps and Keys page (you can also get there from the Docs)

Add a new app:

Get the ClientId, ClientSecret and set the redirect URI:

clientId: Integration Key

clientSecret: Secret Keys

set the Redirect URI to https://[YOUR_API_BASE]/auth/docusign/callback, for example https://api.appmixer.com/auth/docusign/callback

And set the clientId, clientSecret to the service configuration in the Backoffice.