How to get value of selected SELECT_SINGLE config parameter

[RoscoHead]

Hi, I’m new to Looker, and working on a connector to retrieve data from a remote site via REST requests. I’ve gone through the tutorial, and have it mostly working, but now I want to add a SELECT_SINGLE config parameter, and use that to choose what to send in the request. I’ve added the following code to getConfig():

  config.newSelectSingle()
    .setId('source')
    .setName('Select Source')
    .setHelpText('Choose the data source you want to use for this connector')
    .addOption(config.newOptionBuilder().setLabel("FBOs").setValue("fbos"))
    .addOption(config.newOptionBuilder().setLabel("Fleet").setValue("fleet"));

But I can’t figure out how to use the selected value of the “source” parameter in my code, can someone help me?

[RoscoHead]

It also appears request.configParams is undefined in getSchema(), is that correct? Does that mean I cannot use the config parameters in getSchema?