swift – iOS Firebase Authentication Issue: “Argument type ‘String.UTF8View’ does not conform to expected type ‘Decoder’

I am trying to add Sign in With Apple to my SwiftUI app with Firebase Authentication and am getting an error with the provided sha256() function. I have referenced many articles and videos and have not come across this error anywhere else:

“Argument type ‘String.UTF8View’ does not conform to expected type ‘Decoder’

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I am using XCode version 14.3.1 with iOS Minimum Deployment 16.1 selected.

This is the function provided by Firebase from here:

private func sha256(_ input: String) -> String {
   let inputData = Data(input.utf8)
   let hashedData = SHA256.hash(data: inputData)
   let hashString = hashedData.compactMap {
       return String(format: "%02x", $0)
   }.joined()
        
   return hashString
}

let inputData = (Data.input.utf8) is throwing the error.

Any help is appreciated