noob error on my code, how to fix it?

Hi guys i’m new to swift programming and i’m trying to create an app for testing using firebase.
I wrote this code and i get just one error on line 90 of my code here on pastebin:

 

https://pastebin.com/vHCzE2rM

 

 

the error says

cannot convert value of type (‘String -> UIViewController’ to expected argument type ‘UIViewController’

basically the problem is that “vc”…


how can i easily fix it?

pls i really need to solve the problem.

 

thanks a lot for your time

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