code: void addConnection(String userId, ConnectionFactoryLocator connectionFactoryLocator, UsersConnectionRepository connectionRepository) {
  		connectionRepository.createConnectionRepository(userId).addConnection(getConnection(connectionFactoryLocator));
  	}
docs: Connect the new local user to the provider.
  @param userId the local user ID
  @param connectionFactoryLocator A {@link ConnectionFactoryLocator} used to lookup the connection
  @param connectionRepository a {@link UsersConnectionRepository}
  @throws DuplicateConnectionException if the user already has this connection