Fixed the Logout Button

src/main/java/mops/gruppen2/controller/MopsController.java

@@ -3,6 +3,8 @@ package mops.gruppen2.controller;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.GetMapping;
 
+import javax.servlet.http.HttpServletRequest;
+
 @Controller
 public class MopsController {
 
@@ -10,4 +12,10 @@ public class MopsController {
     public String redirect(){
         return "redirect:/gruppen2/";
     }
+
+    @GetMapping("/logout")
+    public String logout(HttpServletRequest request) throws Exception {
+        request.logout();
+        return "redirect:/gruppen2/";
+    }
 }