OAM as IDP for SAML

Reference sites:

https://auth0.com/blog/how-saml-authentication-works/

https://docs.oracle.com/en/middleware/idm/access-manager/12.2.1.3/oamhl/create-identity-provider-partner.html

https://www.oracle.com/webfolder/technetwork/tutorials/obe/cloud/sharedidm/cloud_sso_idp_configuration/OAM11gR2/OAMIF11gR2_IdPConfig_CloudSP.html