Feature-Request: Changing the Author of previous commits via toolbelt command

[bjesuiter]

I regularly need to change the Author of git commits, because I deal with multiple git identities on my development machine and it sometimes happens that I use the wrong identity for commits.

This is especially bad for contributing to OpenSource Repos.

I found these instructions to perform a author change on previous commits:
https://www.git-tower.com/learn/git/faq/change-author-name-email/

These steps are hard to remember and tedious, can you consider to add a consolidated command to git-toolbelt for that?
Or even two different commands, if that is simpler for separating concerns.