auto.$provide.provider()

Register a provider function with the $injector. Provider functions are constructor functions, whose instances are responsible for "providing" a factory for a service.

Service provider names start with the name of the service they provide followed by Provider. For example, the $log service has a provider called $logProvider.

Service provider objects can have additional methods which allow configuration of the provider and its service. Importantly, you can configure what kind of service is created by the $get method, or how that service will act. For example, the $logProvider has a method debugEnabled which lets you specify whether the $log service will log debug messages to the console or not.