How can I sign out of OneDrive?

[Windows Central Question]

I was trying to download my powerpoint presentation from the online one, which is part of OneDrive, and it recommended I sign into it using my microsoft ID. I did, and now all of the files I had on my computer, almost all of which was for college, have been deleted by OneDrive. Now I want to know how I can sign out of OneDrive so this doesn't happen again.