#59 added error handling when not having put token in config.json

lib/manager/modManager.js

@@ -25,7 +25,7 @@ modManager.listMods("shared");
 */
 module.exports.listMods = function(instance){
 	if(instance && instances.includes(instance)){
-		factorioAPI.init(false, 'instances/'+instance+'/mods', 'instances/'+instance+'/saves', '0.15.37');
+		factorioAPI.init(false, 'instances/'+instance+'/instanceMods', 'instances/'+instance+'/saves', '0.15.37');
 		console.log("Authenticating to factorio.com...")
 		factorioAPI.authenticate({
 			username: config.username,
@@ -45,12 +45,14 @@ module.exports.listMods = function(instance){
 				})));
 			});
 			// Deactivated due to bug in node-factorio-api, see https://github.com/Danacus/node-factorio-api/issues/2
-			
+			// bug is resolved, thanks to @Danacus and @brotherpot
 			/*factorioAPI.getModsFromSaves().then(list => {
 				console.log("Mods used in save:");
 				console.log(JSON.stringify(list))
 				console.log(asTable(list[0].mods))
 			});*/
+		}).catch(reason => {
+			console.log("Failed to authenticate to factorio.com! Please check your connection and the username+token used for authentication in config.json");
 		});
 	} else {
 		// list shared mods in /sharedMods/