[Python] access denied on smbclient.register_session

i try to connect from my mac to a smb server using this

smbclient.register_session(
"smbserver.net",
username="domain\\username",
password="secret",
port=445
)


but i allways get this error

AccessDenied: Received unexpected status from the server: A process has requested access to an object but has not been granted those access rights. (3221225506) STATUS_ACCESS_DENIED: 0xc0000022


to check that the authentication is working i entered a wrong combination which lead to a LogonFailure. so this cannot be it. i also tried changing the username to username@domain.net with the same AccessDenied error.

Using finder and a nifi container running on my machine i could establish a connection and load files.

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