import 'dart:convert'; String encodeBase64UserPass(String user, String pass) { String credentials = "$user:$pass"; Codec stringToBase64 = utf8.fuse(base64); return stringToBase64.encode(credentials); } String encodeBase64(String value) { Codec stringToBase64 = utf8.fuse(base64); return stringToBase64.encode(value); } String decodeBase64(String value) { return utf8.decode(base64.decode(value)); }