RGB 5 pin fan to 4 pin sockets in motherboard. (Confused!)

[uber_plays]

I'm new to building pcs and the case I bought (Rosewill Cullinan RGB)'s rear fan is a 5 pin. My motherboard is the Z370 Aorus Gaming 7 and it has only 4 pin slots for fans. What should I buy or do so my rgb fans work normally

 

[RememberThe5th]

I would not recommend,
your motherboard has connector