diff --git a/src/main/java/cactusServer/models/Accounts.java b/src/main/java/cactusServer/models/Accounts.java
index 9c2e5c6..092d95b 100644
--- a/src/main/java/cactusServer/models/Accounts.java
+++ b/src/main/java/cactusServer/models/Accounts.java
@@ -11,7 +11,7 @@
 public class Accounts {
 	private static Accounts theInstance = null;
 	private HashMap<String, Account> accounts = new HashMap<>();
-	private HashSet<String> idlist = new HashSet<String>();
+	private HashSet<String> idList = new HashSet<String>();
 
 	private Accounts() {
 
@@ -26,10 +26,11 @@
 
 	public Account createAcount(String userID, String userName, String userPass) {
 		System.out.println(userName);
-
+		if(!idList.add(userID)) {
+			return null;
+		}
 		Account newAccount = new Account(userName, userPass);
 		accounts.put(userID, newAccount);
-		idlist.add(userID);
 		System.out.println(userID);
 
 		return newAccount;