feature #15882 Easier Custom Authentication errors (weaverryan)

This PR was merged into the 2.8 branch.

Discussion
----------

Easier Custom Authentication errors

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | not yet

This makes failing authentication with a custom message much easier:

```php
throw CustomAuthenticationException::createWithSafeMessage(
    'That was a ridiculous username'
);

// or
$e = new CustomAuthenticationException();
$e->setSafeMessage('That was a ridiculous username');

throw $e;
```

Currently, to do this, you'd need to create a new sub-class of `AuthenticationException`, which is way more work than it needs to be. The original design was so that all messages exposed are safe, which is why I've named the methods like I have.

Thanks!

Commits
-------

d7c1463 Adding a class to make it easier to set custom authentication error messages

0 files changed, 0 insertions, 0 deletions