[Freeipa-users] Get username and password via bind preop plugin in FreeIPA

Hello, I have FreeIPA version 4.6.4, api_version 2.229 The system supports sasl bind version 3, mech GSSAPI. I need to support logon from the front end for users who are not part of the FreeIPA directory server. For such users I will need to bind as a predefined existing Free IPA account. The problem is I can not capture a username (entered in the front end) in the pre-op bind plugin. FreeIPA does not even call the pre-op plugin if it can not find a username, entered in the front end, in the Directory Server. What can I do to grab a username from the front end? Thanks,