Automatically create account on login screen

src/main/java/emu/grasscutter/commands/ServerCommands.java

@@ -188,6 +188,7 @@ public final class ServerCommands {
                     } else {
                         CommandHandler.sendMessage(null, "Account created with UID " + account.getPlayerId() + ".");
                         account.addPermission("*"); // Grant the player superuser permissions.
+                        account.save(); // Save account to database.
                     }
                     return;
                 case "delete":