is it possible to request a preapproval key using Embedded Flow instead of redirecting the user to PayPal? I've done it with payKeys but I can't find examples of how to do it for future payments.
I tried changing the url of the light box to:
a) /webapps/adaptivepayment/flow/pay?preapprovalkey=PA-XXXXX
b) /webapps/adaptivepayment/flow/preapproval?preapprovalkey=PA-XXXXX
none of them worked.