private void validateSID(String sid) {
		if (!UserManager.isValidUserName(sid)) {
			displayUsage("Invalid username/sid: " + sid);
			System.exit(-1);
		}
	}
Validate username/sid
@param args command args
@param i argument index
Ghidra/Features/GhidraServer/src/main/java/ghidra/server/ServerAdmin.java