User blog comment:Rappy 4187/Technical Update: September 7, 2015/@comment-26009167-20150909152420

Confirmed that Special:UserLogin still works although new in-page login forms are added.

Question for when Helios becomes a thing: Will wiki bots still be able to log in the same way as before, through the API? If not, will Staff help me and any others who may be using wiki bots on Wikia to switch over to the new login system?