Log a meaningful error if Okta connector isn't invoked correctly

[shasibhusanJena]

added the log in app.py file, please review it. issue no #416

[adorton-adobe]

We shouldn't be adding any additional log messages to the general exception handler of the application. That handler will log any AssertionException the application throws.

You need to determine the best place to check for the error condition an throw an AssertionException. That check will very likely need to happen in the ConfigHandler class. I would start by looking at get_directory_connector_options and get_directory_connector_configs.

[shasibhusanJena]

• removed line from app.py default AssertionException block
• added a separate code block on config.py file to validate this condition.

[shasibhusanJena]

raised a new pull request from Branch