Update CreateTokenDemo.java

Signed-off-by: SimiHunjan <simi.hunjan.k@gmail.com>

Author: SimiHunjan

.github/examples/java/CreateTokenDemo.java

@@ -11,7 +11,7 @@ public class CreateTokenDemo {
     public static void main(String[] args ) throws Exception {
         // .env-provided
         String operatorId = AccountId.fromString(System.getenv("OPERATOR_ID"));
-        String operatorKey = System.getenv("OPERATOR_KEY");
+        String operatorKey = PrivateKey.fromString(System.getenv("OPERATOR_KEY"));
         String network = System.getenv().getOrDefault("HEDERA_NETWORK", "local"); // "local" for Solo
         String mirrorNode = System.getenv().getOrDefault(
             "MIRROR_NODE_URL",
@@ -27,7 +27,7 @@ public static void main(String[] args ) throws Exception {
                 ? Client.forNetwork(java.util.Map.of("127.0.0.1:50211", new AccountId(3))) // Solo default node + node account (adjust if needed)
                 : Client.forTestnet();
 
-        client.setOperator(AccountId.fromString(operatorId), PrivateKey.fromString(operatorKey));
+        client.setOperator(operatorId, operatorKey);
 
         // generate token keys
         PrivateKey supplyKey = PrivateKey.generateECDSA();