collection query builder
diff --git a/src/main/java/de/ids_mannheim/korap/web/service/full/UserService.java b/src/main/java/de/ids_mannheim/korap/web/service/full/UserService.java
index 9273171..5aa25c9 100644
--- a/src/main/java/de/ids_mannheim/korap/web/service/full/UserService.java
+++ b/src/main/java/de/ids_mannheim/korap/web/service/full/UserService.java
@@ -4,6 +4,7 @@
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.sun.jersey.spi.container.ContainerRequest;
import com.sun.jersey.spi.container.ResourceFilters;
+import de.ids_mannheim.korap.config.Attributes;
import de.ids_mannheim.korap.config.BeansFactory;
import de.ids_mannheim.korap.config.Scopes;
import de.ids_mannheim.korap.config.URIParam;