SNC Connection error help

[xrevert]

Hello,
I am able to connect using user-id and password. But when trying to connect via SNC I get this error:

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "src\pyrfc\_cyrfc.pyx", line 641, in pyrfc._cyrfc.Connection.init
File "src\pyrfc\_cyrfc.pyx", line 709, in pyrfc._cyrfc.Connection._open
File "src\pyrfc\_cyrfc.pyx", line 733, in pyrfc._cyrfc.Connection._error
pyrfc._exception.CommunicationError: 1 (rc=1): key=RFC_COMMUNICATION_FAILURE, message=
LOCATION CPIC (TCP/IP) on local host CC-jdoe with Unicode
ERROR SNCERR_UNKNOWN_MECH
SncPImportPrName() parsing error
name="p/krb5:johndoe@P.M.COM"
TIME Tue Nov 14 21:10:03 2023
RELEASE 753
COMPONENT SNC (Secure Network Communication)
VERSION 6
RC -38
MODULE D:/753_REL/src/krn/snc/sncxxall.c
LINE 2272
DETAIL SncPSetNewName
COUNTER 3
[MSG: class=, type=, number=, v1-4:=;;;]

Any guidance what should be the SNC_NAME format?

This is the code:

conn = Connection(snc_qop='8',saprouter='/H/52./S/3830',client='100', sysnr='11',ashost='sapxxx', snc_partnername='p/krb5:sapxxx@P.M.COM', SNC_MYNAME='p/krb5:johndoe@P.M.COM', SNC_LIB='C:\Program Files (x86)\SAP\SNCEncryption\x64\sapsncencryption.dll')