diff --git a/src/main/java/mops/gruppen2/controller/Gruppen2Controller.java b/src/main/java/mops/gruppen2/controller/Gruppen2Controller.java
index 5883a89..59ee52b 100644
--- a/src/main/java/mops/gruppen2/controller/Gruppen2Controller.java
+++ b/src/main/java/mops/gruppen2/controller/Gruppen2Controller.java
@@ -15,13 +15,16 @@ import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
 import org.springframework.web.bind.annotation.*;
 import org.springframework.web.client.RestTemplate;
+import org.springframework.web.context.annotation.SessionScope;
 import org.springframework.web.server.ResponseStatusException;
 
 import javax.annotation.security.RolesAllowed;
 import java.util.ArrayList;
 import java.util.List;
 
+
 @Controller
+@SessionScope
 @RequestMapping("/gruppen2")
 public class Gruppen2Controller {
 
@@ -56,7 +59,7 @@ public class Gruppen2Controller {
         User user = new User(account.getName(), account.getGivenname(), account.getFamilyname(), account.getEmail());
 
         model.addAttribute("account", keyCloakService.createAccountFromPrincipal(token));
-        model.addAttribute("gruppen", userService.getUserGroups(user.getUser_id()));
+        model.addAttribute("gruppen", userService.getUserGroups(user));
         model.addAttribute("user",user);
         return "index";
     }
@@ -125,4 +128,12 @@ public class Gruppen2Controller {
         throw new ResponseStatusException(HttpStatus.NOT_FOUND, "Group not found");
     }
 
+    @RolesAllowed({"ROLE_orga", "ROLE_studentin", "ROLE_actuator)"})
+    @PostMapping("/leaveGroup")
+    public String pLeaveGroup(KeycloakAuthenticationToken token, @RequestParam (value="group_id") Long id) {
+        Account account = keyCloakService.createAccountFromPrincipal(token);
+        controllerService.deleteUser(account, id);
+        System.out.println(id);
+        return "redirect:/gruppen2/";
+    }
 }
diff --git a/src/main/java/mops/gruppen2/domain/event/DeleteUserEvent.java b/src/main/java/mops/gruppen2/domain/event/DeleteUserEvent.java
index 6deb074..d7cff68 100644
--- a/src/main/java/mops/gruppen2/domain/event/DeleteUserEvent.java
+++ b/src/main/java/mops/gruppen2/domain/event/DeleteUserEvent.java
@@ -9,6 +9,7 @@ import mops.gruppen2.domain.Group;
  * Entfernt ein einzelnes Mitglied einer Gruppe.
  */
 @Getter
+@NoArgsConstructor
 public class DeleteUserEvent extends Event {
     public DeleteUserEvent(Long group_id, String user_id) {
         super(group_id, user_id);
diff --git a/src/main/java/mops/gruppen2/service/ControllerService.java b/src/main/java/mops/gruppen2/service/ControllerService.java
index 3a42f8c..f0ee54d 100644
--- a/src/main/java/mops/gruppen2/service/ControllerService.java
+++ b/src/main/java/mops/gruppen2/service/ControllerService.java
@@ -65,4 +65,10 @@ public class ControllerService {
         UpdateRoleEvent updateRoleEvent = new UpdateRoleEvent(group_id,account.getName(),Role.ADMIN);
         eventService.saveEvent(updateRoleEvent);
     }
+
+    public void deleteUser(Account account, Long group_id){
+        DeleteUserEvent deleteUserEvent = new DeleteUserEvent(group_id,account.getName());
+        System.out.println(deleteUserEvent.getGroup_id() + " " + deleteUserEvent.getUser_id());
+        eventService.saveEvent(deleteUserEvent);
+    }
 }
diff --git a/src/main/java/mops/gruppen2/service/UserService.java b/src/main/java/mops/gruppen2/service/UserService.java
index 7fe6122..74a9ca4 100644
--- a/src/main/java/mops/gruppen2/service/UserService.java
+++ b/src/main/java/mops/gruppen2/service/UserService.java
@@ -2,13 +2,14 @@ package mops.gruppen2.service;
 
 import mops.gruppen2.domain.Exceptions.EventException;
 import mops.gruppen2.domain.Group;
+import mops.gruppen2.domain.User;
 import mops.gruppen2.domain.event.Event;
 import mops.gruppen2.repository.EventRepository;
 import org.springframework.stereotype.Service;
 
 import java.util.ArrayList;
 import java.util.List;
-
+//Hallo
 @Service
 public class UserService {
 
@@ -22,10 +23,17 @@ public class UserService {
 
     //Test nötig??
 
-    public List<Group> getUserGroups(String user_id) throws EventException {
-        List<Long> group_ids = eventRepository.findGroup_idsWhereUser_id(user_id);
+    public List<Group> getUserGroups(User user) throws EventException {
+        List<Long> group_ids = eventRepository.findGroup_idsWhereUser_id(user.getUser_id());
         List<Event> events =  groupService.getGroupEvents(group_ids);
-        return groupService.projectEventList(events);
+        List<Group> groups = groupService.projectEventList(events);
+        List<Group> newGroups = new ArrayList<>();
+        for (Group group: groups) {
+            if(group.getMembers().contains(user)){
+                newGroups.add(group);
+            }
+        }
+        return newGroups;
     }
 
     public Group getGroupById(Long group_id) throws EventException {
diff --git a/src/main/resources/templates/detailsMember.html b/src/main/resources/templates/detailsMember.html
index a4fffe7..aa0d7f6 100644
--- a/src/main/resources/templates/detailsMember.html
+++ b/src/main/resources/templates/detailsMember.html
@@ -28,20 +28,20 @@
     <div class="container-fluid">
         <div class="row">
             <div class="shadow-sm p-4" style="border: 10px solid aliceblue; background: aliceblue">
-                <form action="/" method="get">
-                    <h1 style="color: dodgerblue; font-weight: bold" th:text="${group.getTitle()}"></h1>
-                    <p style="font-weight: bold">
-                        <span class="badge badge-pill badge-dark" style="background: darkslategray" th:if="${group.getVisibility() == group.getVisibility().PRIVATE }">Private Gruppe</span>
-                        <span class="badge badge-pill badge-primary" th:if="${group.getVisibility() == group.getVisibility().PUBLIC}">Öffentliche Gruppe</span>
-                        <span class="badge badge-pill badge-success" style="background: lightseagreen" th:if="${group.getType() == group.getType().LECTURE}"> Veranstaltung</span>
-                    </p>
-                    <p th:text="${group.getDescription()}"></p>
-                    <div class="form-group">
-                        <div class="text-right">
-                            <button class="btn btn-danger" type="danger" style="border-style: none;">Gruppe verlassen</button>
-                        </div>
+                <h1 style="color: dodgerblue; font-weight: bold" th:text="${group.getTitle()}"></h1>
+                <p style="font-weight: bold">
+                    <span class="badge badge-pill badge-dark" style="background: darkslategray" th:if="${group.getVisibility() == group.getVisibility().PRIVATE }">Private Gruppe</span>
+                    <span class="badge badge-pill badge-primary" th:if="${group.getVisibility() == group.getVisibility().PUBLIC}">Öffentliche Gruppe</span>
+                    <span class="badge badge-pill badge-success" style="background: lightseagreen" th:if="${group.getType() == group.getType().LECTURE}"> Veranstaltung</span>
+                </p>
+                <p th:text="${group.getDescription()}"></p>
+                <div class="form-group">
+                    <div class="text-right">
+                        <form method="post" action="/gruppen2/leaveGroup">
+                            <button th:value="${group.getId()}" th:name="group_id" class="btn btn-danger" type="submit" style="border-style: none;">Gruppe verlassen</button>
+                        </form>
                     </div>
-                </form>
+                </div>
             </div>
 
             <div class="col-3" style="white-space: nowrap">
@@ -53,8 +53,8 @@
                 <div>
                     <ul th:each="member : ${group.getMembers()}" class="list-group-flush" style="background: slategrey">
                         <li  class="list-group-item" style="background: aliceblue">
-                                <span th:text="${member.getUser_id()}"></span>
-                                <span th:if="${role == role.ADMIN}" class="badge badge-success">admin</span>
+                            <span th:text="${member.getUser_id()}"></span>
+                            <span th:if="${role == role.ADMIN}" class="badge badge-success">admin</span>
                         </li>
                     </ul>
                 </div>