API key- How to get API key for Oracle Flexcube application. Kindly help me as am struck with this for past 4 days

API key- How to get API key for Oracle Flexcube application. Kindly help me as am struck with this for past 4 days

hi,
do Http request flow fcube guide https://docs.oracle.com/cd/E94300_01/PDF/RestService/Oracle_Flexcube_Restful_Services_Usage.pdf