ProviderSignInUtils API desync with docs

It seems that ProviderSignInUtils API has changed from static methods to interface, but docs still use old version which made me confused for some time.

If that will help, I solved it in straight forward way (probably not the best) in my SocialConfigurer added

@Autowired
ConnectionFactoryLocator connectionFactoryLocator;

@Bean
public ProviderSignInUtils providerSignInUtils() {
   return new ProviderSignInUtils(connectionFactoryLocator, getUsersConnectionRepository(connectionFactoryLocator));
}

And just AutoWired it in controller where I needed it:

@Autowired
private ProviderSignInUtils signInUtils;

spring-attic / spring-social

ProviderSignInUtils API desync with docs #171