Single stats for the same author with multiple username and/or email

[javaDeveloperKid]

Is your feature request related to a problem? Please describe.
I often work with repositories where single user creates commits with different username and/or email. This can happen for different reasons: git is configured differently on a computer in a workplace and on a computer at home; commits are from Web UI where a user has different name/email; user changed an email after some time;

Describe the solution you'd like
I would like to somehow tell git-quick-stats to consider given author keywords as the same author.
Example:
John Kravecki john.kravecki@job.com
johnk johnk@gmail.com
Then I tell git-quisk-stats that any of [user: John Kravecki, email: john.kravecki@job.com, user:johnk, email:johnk@gmail.com] is the same author.

Describe alternatives you've considered
Another solution would be to have an option to merge results into one.
Example:
I have the same user with multiple username and/or email but I know that every time there is the same pattern, e.g. a surname kravecki. Then I can use _GIT_LOG_OPTIONS="--author=kravecki but I need another option, e.g. --same-author or --merge-author to get stats like it was a single user.

Additional context
None

[MuhammadSulaiman001]

This could be solved using git .mailmap, here is an example:

1. Create .mailmap file at the root of the project,
2. Here is an example content to write in .mailmap file:

Muhammad Sulaiman <muhammad.b.sulaiman001@gmail.com>
Muhammad Sulaiman <muhammad.b.sulaiman001@gmail.com> <m.sulaiman001@gmail.com>
Friend Name <hi@there.com>
Friend Name <hi@there.com> <90533@LAPTOP-ABV>

Explanation: the first line tells git that this name has this e-mail, second line tells git that there is another alias for this (name-email pair).. and so on.

This way, git will use Muhammad Sulaiman <muhammad.b.sulaiman001@gmail.com> whenever it sees m.sulaiman001@gmail.com..

Now run git-quick-stats again, issue solved.

I've documented the steps in the following gist long time ago, refer to it for detailed description.

[javaDeveloperKid]

@MuhammadSulaiman001 thank you for your answer. Will check that out asap. However what about same email and different name? E.g.:

Muhammad Sulaiman <muhammad.b.sulaiman001@gmail.com>
msulaiman <muhammad.b.sulaiman001@gmail.com>