Swift AWS Cognito exception handler with customized descriptions

Error.swift

import AWSCognitoIdentityProvider

extension Error {
    var customizedDescription: String {
        let nsError = self as NSError
        if nsError.domain == AWSCognitoIdentityProviderErrorDomain, let code = AWSCognitoIdentityProviderErrorType(rawValue: nsError.code) {
            switch code {
            case .expiredCode: return "Verification code has expired. Please try again"
            case .codeMismatch: return  "Incorrect verification code. Please enter the correct code to continue."
            case .notAuthorized: return "Authentication failed. Please enter the correct credentials to continue."
            case .usernameExists: return "Username already exists."
            case .invalidPassword: return "Invalid password. Please try again."
            case .userNotConfirmed: return "User not confirmed. Please verify your account."
            default: return nsError.userInfo["message"] as? String ?? "AWS cognito failed with error code: \(nsError.code)"
            }
        }
        return localizedDescription
    }
}