Just to make sure, do you have the opening curly bracket before your first line above? Also, why do you have “code_text” after the comma at the end?
I also notice that you use single quote marks instead of double-quotes in the config: block. I am not sure that matters, but all of the examples use double-quotes. (Single quotes should work, but there is always the chance that npm, MM, or some other component is expecting double-quotes.)
When you say you cannot get it working, does having that block of code in your config.js cause MM not to launch correctly at all? (Ie., do you get a black screen or the “create a config or check the existng one for errors” message?) Or does MM launch correctly, and the module does not show up? Or it shows up, but just has a “Loading” message instead of the expected calendar?