Firebase unresolved identifier constants

Hey guys;

For starters, I am new to coding. I’m currently watching Chris’ youtube video, “Firebase Authentication Tutorial 2020 - Custom iOS Login Page (Swift)” and for the most part everything has been successful. The part I’m stuck on is the transitionToHome towards the end of signUpViewController. Please help me! I have search the web and the community and can not find a solution. Thank you very much in advance!!

can you check if you have a missing import or what it suggests for “Constants”?

I have the UIKit and all the firebase imports. Should I have another?

What is Constants.Sotoeyboard?
Did you spell anything wrong?