How to fix Swift error?

Question

Swift

When you click on the icon, the list of users from the Firebase database should come out,
but the application breaks

[9363:1276925] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<motoRider.User 0x600001bdf900> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key email.'

Answer 1

Even without seeing the code, by mistake, it is clear that you are trying to write data on the "email" key to the motoRider.User object , and this object does not support such treatment with it.
Give the code, then we will look in more detail.