var data = Data(base64Encoded: recording_base64, options: .ignoreUnknownCharacters)
import UIKit extension String { func fromBase64() -> String? { guard let data = Data(base64Encoded: self) else { return nil } return String(data: data, encoding: .utf8) } func toBase64() -> String { return Data(self.utf8).base64EncodedString() } }