public String processInput(String input) {
		
		stringParts = input.split(" ");
		
		try {
			cmdPart = stringParts[0];
		} catch (NullPointerException e) {
			System.out.println("Error: found no Command");
		}
		
		if (cmdPart.equals("!login")) {
			return logginUser();
		}
		if (cmdPart.equals("!logout")) {
			return loggoutUser();
		}
		if (cmdPart.equals("!list")) {
			return listAuctions();
		}
		if (cmdPart.equals("!create")) {
			return createAuction();
		}
		if (cmdPart.equals("!bid")) {
			return bidForAuction();
		}
		return "Error: Unknown command: " + input;
	}