In Table A.25. ConfiguredIdentity Module Options there is list of options for this module but it doesn't contain all possible option. Module also uses username and password. These options should be added.
Verified on docs-stage: Security guide: Revision 6.2.2-7, Revision 6.3.0-12 Administration and configuration guide: Revision 6.2.2-7, Revision 6.3.0-10