Updated callbacks to all return

controllers/adminController.js

@@ -20,7 +20,7 @@ async function getPresetsOfOnlineNodes(callback) {
             systems[onlineNode.id] = utils.BufferToJson(onlineNode.nearbySystems);                        
         });                
 
-        callback(systems);
+        return callback(systems);
     });
 }
 
@@ -31,7 +31,7 @@ async function requestNodeListenToPreset(preset, nodeId, callback) {
             "channelID": discordConfig.channelID,
             "presetName": preset
         }), (responseObject) => {
-            callback(responseObject)
+            return callback(responseObject)
         });
     })    
 }
@@ -46,7 +46,7 @@ async function getNodeBotStatus(nodeId, callback) {
             else {
                 // Bot is free
             }
-            callback(responseObject);
+            return callback(responseObject);
         });
     });
 }
@@ -58,13 +58,13 @@ async function requestNodeLeaveServer(nodeId, callback) {
             mysqlHandler.getNodeInfoFromId(nodeId, (nodeObject) =>{           
                 reqOptions = new requests.requestOptions("/bot/leave", "POST", nodeObject.ip, nodeObject.port);
                 requests.sendHttpRequest(reqOptions, JSON.stringify({}), (responseObject) => {
-                    callback(responseObject);
+                    return callback(responseObject);
                 });
             });
         }
         else {
             // Bot is free
-            callback(false);
+            return callback(false);
         }
     })
 }