Requested by cswiki community at https://cs.wikipedia.org/wiki/Diskuse_k_Wikipedii:Zku%C5%A1enosti_nov%C3%BDch_wikipedist%C5%AF/N%C3%A1st%C4%9Bnka_mentora.
It wasn't done, as it's not exactly straightforward from JS, but if the PHP API included that information, it should be easy enough. Filling as a possible future enhancement.