Sourcetree version 3.4.8 for Windows
I am locked out due to the new API token authentication functionality. I was able to successfully create a new API token but when I follow the documentation on this page to add it to Sourcetree, I do not have the option for API token under "Authentication." I only have OAuth or Basic. Screenshot attached.

RESOLVED. Turns out that version 3.4.8 is a version BEFORE 3.4.31 so an update resolved the issue (my sourcetree told me I was up to date).