That is obviously not black hair.

You are performing such mental dynamics

Cassidy, who has been heavily implied to be Golden Freddy in literally every FNaF game where the MCI is mentioned, as well as female, isn't TOYSHNK because a photo that has been established to NOT HOLD LORE SIGNIFICANCE to be IRRELEVANT since Scott only has pictures of sons available is a male?

That is obviously not black hair.

Exposure!!

Brightness!

Other things that affect color!

It's black

Cassidy isn't refer as female in no games and vcanon books sampione

Cassidy was referred to a bot , and before you say " oh its for golden freddy" I have yet to see why ghosts would call a female a boy if they know it's a. Girl

Could be blonde

Boy"

Blonde hair doesn't even matter because csnonly we haven't seen Cassidy at all

Could be blonde 

That's a picture of scott's son, heavily edited

I look him up, he has black hair

Who said TOYSNHK is Golden Freddy?

Also, the same argument can be used for Andrew because he also has black hair lol.

Literally the wading of fnaf ucn

I seriously do not understand where all of these mental gymnastics of Andrew being TOYSHNK have surfaced over the last six months or so. There are literally dozens of pieces of evidence linking Cassidy to Golden Freddy, and it's heavily implied by FFPS as well as dozens of other newspaper scraps throughout the series, that there are only five missing children.

Scott would not have introduced the real identity of one of the THREE BIGGEST CHARACTERS IN THE SERIES up until that point just to have him only appear in a questionably canon book series and never be mentioned again. Some minor discrepancies in TOYSHNK's gender that can be easily explained with relatively simple logic are not enough to topple literally years' worth of evidence and speculation.

TLDR: Andrew fans on copium.