Need help connecting with domain user

[Suraj25P]

import winrm
host = 'YourWindowsHost'
domain = 'YourDomain'
user = 'YourDomainUser'
password = 'YourPassword'
session = winrm.Session(host, auth=('{}@{}'.format(user,domain), password), transport='ntlm')

I have this above code but I'm not able to connect to windows host .. I have the right credentials as i am able to login manually.
I tried different transport methods
for ntlm,ssl and plaintext transport methods I get this below error:
<class 'winrm.exceptions.InvalidCredentialsError'>
<class 'Exception'> the specified credentials were rejected by the server

and for kerberos transport method I get :
<class 'winrm.exceptions.WinRMError'>
<class 'Exception'> requested auth method is kerberos, but requests_kerberos is not installed .....(i have installed requests_kerberos).

[ghost-ng]

this helped me, it had to do with the escape characters to properly format the domain & username entry.

self.username = f'{domain}\{username}' if domain else username

    p = Protocol(
        endpoint=endpoint,
        transport='ntlm',
        username=self.username,
        password=self.password,
        server_cert_validation='ignore',
        operation_timeout_sec=1000,  # Set timeout to 120 seconds
        read_timeout_sec=1200  # Set read timeout to 240 seconds (greater than operation timeout)

    )
    self.shell_id = p.open_shell()
        return p