Request for Assistance with Configuring Citation Key Formats in Better BibTeX

Hello,

I have configured the citation key formula in Better BibTeX as follows:

authors(n=1, etal=_et_al)+"_"+year

I would like the citation keys to vary based on the number of authors:

For one author: author1_2024
For two authors: author1_and_author2_2024
For three or more authors: author1_et_al_2024
This formula currently works for one author and for more than two authors.

Is there a format available that can work as described for all scenarios? I would appreciate your guidance.
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