CKeditor 4 and Loop Index plugin

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Hello fellow AppWorks developers,

We are using CKeditor in our AppWorks solutions. I have implemented the Loop Index plugin which allows track changes. However, the solution would work better if I could pass the username (userid) of the logged in user. CKeditor has a config.js where lots of options can be turned on. How can I dynamically pass the current User in AppWorks in the config.js for CKeditor? I would like to keep this in config.js as this is where I can set options for Loop Index plugin.

Many Thanks for any assistance!