Regex in validateData geändert

src/Data.java

@@ -242,7 +242,7 @@ public class Data {
         boolean passwordValid = false;
 
         Pattern phoneNumberPattern = Pattern.compile("[0-9]*");
-        Pattern passwordPattern = Pattern.compile("^[^a-zA-Z0-9].*[0-9]$");
+        Pattern passwordPattern = Pattern.compile("^(?=.*[A-Za-z])(?=.*\\d)[A-Za-z\\d]{8,}$");
 
         Scanner reader = new Scanner(System.in);