Copyright (C) 2014 Philip Helger (www.helger.com)
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
This class represents the result of a credential validation.
Success only constructor.
Constructor with an error message
The error message. May neither be
null nor empty.
- The error message or
null if this is a success.