Added a method that changes the stayLoggedIn variable in the JSON file

src/main/java/CreateUser.java

@@ -111,11 +111,31 @@ class CreateUser {
         return userList;
     }
     
+ // Function to update stayLoggedIn variable in the JSON file
+    public static void updateStayLoggedIn(String filename, String username, boolean stayLoggedIn) {
+        List<CreateUser> userList = readUserListFromJsonFile(filename);
+
+        for (CreateUser user : userList) {
+            if (user.getUserName().equals(username)) {
+                user.setStayLoggedIn(stayLoggedIn);
+                break;
+            }
+        }
+
+        try (FileWriter fileWriter = new FileWriter(filename)) {
+            Gson gson = new GsonBuilder().setPrettyPrinting().create();
+            gson.toJson(userList, fileWriter);
+            System.out.println("StayLoggedIn updated in " + filename);
+        } catch (IOException e) {
+            System.out.println("Error occurred while updating StayLoggedIn in JSON file: " + e.getMessage());
+        }
+    }
+
     public static void main(String[] args) {
         try {
             // Example usage
         	UUID randomUUID = UUID.randomUUID();
-        	CreateUser user = createUser(randomUUID.toString(), "Another Test User", "TestPasswort123", "01.01.2000");
+        	CreateUser user = createUser(randomUUID.toString(), "Test User", "TestPasswort123", "01.01.2000");
 
             // Example of accessing properties
             System.out.println("UserID: " + user.getId());
@@ -126,6 +146,8 @@ class CreateUser {
 
             // Save user information to a JSON file
             user.saveToJsonFile("user.json");
+            
+            updateStayLoggedIn("user.json", "Test User", true);
         } catch (IllegalArgumentException e) {
             System.out.println("Error: " + e.getMessage());
         }

user.json

@@ -12,5 +12,19 @@
     "password": "123456",
     "birthday": "01.01.2000",
     "stayLoggedIn": false
+  },
+  {
+    "id": "685bc3a6-e706-4214-a5e1-8443d1a5258e",
+    "userName": "Test User",
+    "password": "TestPasswort123",
+    "birthday": "01.01.2000",
+    "stayLoggedIn": false
+  },
+  {
+    "id": "503f2d6a-389c-4675-8044-3ec9ca73f1b5",
+    "userName": "Test User",
+    "password": "TestPasswort123",
+    "birthday": "01.01.2000",
+    "stayLoggedIn": false
   }
 ]