Getting Authorization code using private key JWT as client authenticatoin.
We are implementing UK open banking and authenticating client using JWS Client Assertion using a private key JWT. Post request to autorisation end point is send with signed JWT in body. It is then redirected to user authentication (username and password). Authorization code is recieved which then need to be exchanged with access token. Not able to achieve this using OAthu2 in soapui as there is no option to use signed JWT (in body). Also is it possible to get the access token is two step ? 1. Get authorizatio code by sending the signed JWT in the body 2. Exchange authorization code with access token