Code restructure and parameterize secrets

[cybermoloch]

I've changed the code around primarily to be able to pass the TenantID, ClientID, and ClientSecret as parameters. I've also made it easier to convert into a module later by making the main execution a function. (Although running it as a single script as its uses if pushing out through GPO for example.)

I would like to do some additional cleanup in regards to adding typing to more variables etc but wanted to know your interest in taking PRs.

[cybermoloch]

Oh, I used VSCode's "Format Document" function which did a lot of formatting changes. Sorry if that makes it harder to review in a single commit.