How to use rdp.session.platform.Definition with RDP Password in refinitiv-data v1.6.2?

Hi Refinitiv Developer Community,
I'm trying to authenticate to the Refinitiv Data Platform using the refinitiv-data Python library, specifically version 1.6.2. My environment is Python 3.12 running on Ubuntu.
My goal is to establish a platform session using my RDP credentials (App Key, RDP Username [which is a Machine ID like GE-A-00220069-3--...], and Password Machine for ID).
I'm attempting to use the rdp.session.platform.Definition class to configure the session and then open it with rdp.open_session(config=...), similar to the structure below:
import refinitiv.data as rdp
import traceback
import sys

RDP_APP_KEY = "YOUR_APP_KEY_PLACEHOLDER"
RDP_USERNAME = "YOUR_MACHINE_ID" # e.g., GE-A-00220069-3--...
RDP_PASSWORD = "YOUR_RDP_PASSWORD_PLACEHOLDER"

try:
print("Defining RDP platform session configuration...")

# --- Attempting to configure platform session ---
# Trying different parameter combinations here causes TypeErrors
session_definition = rdp.session.platform.Definition(
    app_key=RDP_APP_KEY,
    # What are the correct parameter names here for v1.6.2?
    # Attempts:
    # 1. username=RDP_USERNAME, password=RDP_PASSWORD
    #    => TypeError: ... got an unexpected keyword argument 'username'
    # 2. rdp_signon_username=RDP_USERNAME, rdp_password=RDP_PASSWORD
    #    => TypeError: ... got an unexpected keyword argument 'rdp_signon_username'
    # 3. Also tried adding sign_on_control=True (combined with above)
    #    => TypeError: ... got an unexpected keyword argument 'sign_on_control'

    # Need the correct parameter names below:
    parameter_name_for_username = RDP_USERNAME,
    parameter_name_for_password = RDP_PASSWORD
)

print("Opening Refinitiv Data Platform session using definition...")
rdp.open_session(config=session_definition)
print("Session opening process initiated...")

# ... rest of the code to use the session ...

except rdp.errors.SessionError as session_error:
# Note: Based on previous errors, SessionError might also not be the correct base class in v1.6.2
print(f"Session Error: {session_error}", file=sys.stderr)
traceback.print_exc()
except Exception as e: # This catches the TypeError etc.
print(f"An unexpected error occurred during setup or execution: {e}", file=sys.stderr)
traceback.print_exc()
finally:
try:
print("Closing session...")
rdp.close_session()
except Exception as close_session_err:
print(f"Error closing session: {close_session_err}", file=sys.stderr)
print("Cleanup finished.")

As noted in the code comments, I've tried various keyword arguments like username, password, rdp_signon_username, rdp_password, and sign_on_control, but they all result in a TypeError: Definition.init() got an unexpected keyword argument '...'.
Could someone please advise on the correct keyword arguments required by rdp.session.platform.Definition in refinitiv-data version 1.6.2 when authenticating with an App Key and RDP Username/Password? Or is there a different preferred method for this authentication type in v1.6.2?
Any help or pointers to the relevant v1.6.2 documentation would be greatly appreciated!
Thanks,
Ian