Dio dio = new Dio();
    file.existsSync();
    String fileName = file.path.split('/').last;
    FormData formData = new FormData.fromMap({
      'name' : nameController.text,
      'email' : emailController.text,
      'password' : passwordController.text,
      'phone' : phoneController.text,
      'isExpert': isExpert,
      'location_id': _mySelection,
      "image": await MultipartFile.fromFile(file.path, filename: fileName)
    });
      var data = await dio.post("http://ipAddress", data: formData);