To configure your custom Service Provider Interface implementations, include a file
with the name of the SPI in the folder META-INF/services/ in a custom JAR.
The content of the file should be the fully qualified name of the implementing class.
For example do the following to provide a custom login provider and publish it to the engine:
META-INF/services/ with the name
org.eclipse.stardust.engine.core.spi.security.ExternalLoginProvidercom.acme.test.MyLoginProvider