[LightDM] Help with logon on domain

[jmpatagonia]

Hello, I need help to execute a logon script on lightdm when logon on a
samba domain server 4 AD.

The logon is ok and using the sentence
session-setup-script=/scripts/logon_linux.sh to execute my script.

But my script does a query ldbsearch against samba4 ldap-builtin using a -k
option (that is kerberos validation) and when the script  executes I think
that still not logging on kerberos yet.

It is possible to execute the script later, when a kerberos ticket is yet
generated ?
regards.
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