Prevent "wrong type"-issue

The argument is may interpreted as number which causes the "pass"
parameter of the user creation to fail. Probably the same applies to the
mail address. But mail addresses are by definition not allowed to start
by a number (iirc) which makes it less a problem. This is mainly a quick
fix. Should be refactored a bit in future.

Signed-off-by: Sheogorath <sheogorath@shivering-isles.com>

bin/manage_users

@@ -33,7 +33,7 @@ async function createUser(argv) {
 		var pass = readline.question("Password for "+argv["add"]+":", {hideEchoBack: true});
 	} else {
 		console.log("Using password from commandline...");
-		var pass = argv["pass"];
+		var pass = "" + argv["pass"];
 	}
 
 	// Lets try to create, and check success