diff --git a/src/main/java/mops/gruppen2/domain/User.java b/src/main/java/mops/gruppen2/domain/User.java
index e473615..efb14b9 100644
--- a/src/main/java/mops/gruppen2/domain/User.java
+++ b/src/main/java/mops/gruppen2/domain/User.java
@@ -5,8 +5,6 @@ import lombok.Data;
 import lombok.EqualsAndHashCode;
 import lombok.Value;
 
-import java.util.List;
-
 @Value
 @AllArgsConstructor
 @EqualsAndHashCode(exclude = {"givenname", "familyname", "email"})
@@ -17,10 +15,4 @@ public class User {
     String givenname;
     String familyname;
     String email;
-
-    List<Long> group_ids;
-
-    public void addGroup(Long group_id){
-        group_ids.add(group_id);
-    }
 }
diff --git a/src/main/java/mops/gruppen2/service/TeilnehmerService.java b/src/main/java/mops/gruppen2/service/TeilnehmerService.java
deleted file mode 100644
index 74cd6ea..0000000
--- a/src/main/java/mops/gruppen2/service/TeilnehmerService.java
+++ /dev/null
@@ -1,26 +0,0 @@
-package mops.gruppen2.service;
-
-import mops.gruppen2.domain.User;
-import mops.gruppen2.domain.event.Event;
-import org.springframework.stereotype.Service;
-
-import java.util.List;
-
-@Service
-public class TeilnehmerService {
-    GroupService groupService;
-    EventService eventService;
-
-    public TeilnehmerService(GroupService groupService, EventService eventService){
-        this.eventService = eventService;
-        this.groupService = groupService;
-    }
-
-    public void assignGroups(User user){
-        List<Event> events = eventService.findAllEvents();
-
-        for (Event event: events) {
-            if(user.getUser_id().equals(event.getUser_id())) user.addGroup(event.getGroup_id());
-        }
-    }
-}