This core class returns Service Instances.
You should NOT instantiate Services directly, but request them via this class.
ATTENTION: This is a Singleton class! To get an instance you may NOT create one by calling:
Instead you MUST use the static method get() to retrieve the correct initialized instance:
Gets the Authenticator instance to be used.
Gets the PrincipalService to be used.
Returns a configured Service.
If the Service could not be found null will be returned.
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