@Override
public Set<String> findUserIdsConnectedTo(
final String providerId, final Set<String> providerUserIds) {
final List<UserConnection> userConnections =
userConnectionRepository.findByProviderIdAndProviderUserIdIn(providerId, providerUserIds);
return userConnections.stream().map(UserConnection::getUserId).collect(toSet());
}
@Override
public List<String> findUserIdsWithConnection(final Connection<?> connection) {
final ConnectionKey key = connection.getKey();
final List<UserConnection> userConnections =
userConnectionRepository.findByProviderIdAndProviderUserId(
key.getProviderId(), key.getProviderUserId());
return userConnections.stream().map(UserConnection::getUserId).collect(toList());
}