We want to recognized all old contributors

[MrSlimCoder]

Is your feature request related to a problem? Please describe.
I am very frustrated because I cannot add all my previous contributors using all contributors bot.

Describe the solution you'd like
I need a command something like this one:

@all-contributors add all for content

Additional context
In our recent project we have around 25 contributors and we added "All Contributors Bot" after 20 Contributors and 5 contributors was recognized by us manually.

How can we recognized old 20 Contributors?

[Berkmann18]

If you're on about the possibility of automatically adding every contributor in a project, that has been in the works but some issues have been highlighted about what it needs to be reliable and I've been pretty much on my own handling this project and life complications.
If you can help, that'd be grand!

[leycec]

Assuming @TheSlimCoder only needs to automate the addition of prior contributors, @tlylt recently solved that concern with a new third-party add-all-contributors.py Python + npm script. See also this well-written explanatory deep dive for incisive details. Thanks so much, @tlylt! 😄

@Berkmann18: Your time is understandably limited. Would simply referencing that script and/or deep dive somewhere within the bowels of the existing documentation be feasible? This is sufficiently useful to interest the general audience for all-contributors. Maybe? Your call, clearly. Also, we all hope you're doing well. 2021 sure was a complicated year, wasn't it? 😓