DeviceUserUpdate constructor
      
      DeviceUserUpdate({ 
    
    
- @JsonKey.new(name: 'deviceID') required String deviceId,
- required DeviceUser deviceUser,
- @JsonKey.new(name: 'userID') required String userId,
Implementation
factory DeviceUserUpdate({
  @JsonKey(name: 'deviceID')
  required String deviceId,
  required DeviceUser deviceUser,
  @JsonKey(name: 'userID')
  required String userId,
}) = _DeviceUserUpdate;