in src/main/java/org/apache/sling/auth/xing/login/impl/DefaultXingLoginUserManager.java [201:212]
public String getHash(final User user) {
try {
final Value[] values = user.getProperty(userHashProperty);
if (values != null && values.length == 1) {
final Value value = values[0];
return value.getString();
}
} catch (RepositoryException e) {
logger.error(e.getMessage(), e);
}
return null;
}