Add support for access tokens

[kimjamia]

Add support for login in with an access token to SQL Server / Azure SQL Database.

Required for #115 as tokens can't be passed via the connection string.

[wokket]

@erikbra We look to have some CI issues atm, I'll try and have a look at those tonight for you.

[kimjamia]

I think I had that same issue locally (before my change) but I figured I messed up something so I just commented it out to get it to build but didn't commit it.

[wokket]

@kimjamia Sorry for the delay here, I know @erikbra is really busy.

I've fixed the build issues (caused by breaking changes upstream), could I get you to rebsae/pull the latest into your branch so it builds and we'll get this sorted?

[kimjamia]

I tested that unit tests pass and my change also still works after merging main to my branch.

[wokket]

Yep all looks good on this side. I was just giving Erik another day or two to respond (as it is primarily his codebase)

[erikbra]

Hi, guys. Terribly sorry for going "missing" on you here. There are a lot of other things going on ATM, so I haven't had much (any) time to follow up here.

I really, really wish the SqlConnection could support specifying the access token in the connection string, but, apparently it doesn't. It was definitely an oversight on my part originally.

Thanks a lot for your contribution, @kimjamia ! And thanks for following up, @wokket !

Merging this :)