Debugging 500 internal error from auth/oauth2/token ?

I am constantly getting 500 error for password type tokens request against auth/oauth2/token, and trying to figure out what went wrong (no change in auth module at all, and start getting such error), so naturally I start trying adding logging, but could not figure out how, does anyone here know how?

looking at this function from app/modules/auth/views.py

@auth_blueprint.route('/oauth2/token', methods=['GET', 'POST'])
 @oauth2.token_handler
 def access_token(*args, **kwargs):
     # pylint: disable=unused-argument
     """
     This endpoint is for exchanging/refreshing an access token.

     Returns:
         response (dict): a dictionary or None as the extra credentials for
         creating the token response.
     """
     # log.info(**kwargs) # added this, but not seeing anything
     return None

the only logging does not seem to print anything in console.

Can anyone kindly offer anything I can try to debug further ?

[frol]

@10000TB log.info expects the first parameter to be a formatting string, so use log.info("ACCESS TOKEN: args=%r, kwargs=%r", args, kwargs).

[10000TB]

Enlightened , 👍

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