Update events/message.js

events/message.js

 module.exports = {
 
-    message: (client, settings, Discord) => {
+    message: (client, settings, Discord, connection) => {
 
         client.on('message', async message => {
-
+            let guildid = message.guild.id;
+            var sql = `SELECT prefix FROM prefixes WHERE guildid ='`+ guildid +`'`;
+            var prefix = "";
+            connection.query(sql, function (err, result) {
+            if (result.length == 0) prefix = settings.prefix;
+            if (result.length > 0) prefix = result[0].prefix;
           let settings = require('../settings.json')
             let prefix = settings.prefix;
             if (message.channel.type === "dm") return;
@@ -17,10 +22,11 @@ module.exports = {
                 command = client.commands.get(client.aliases.get(cmd));
             }
                 try {
-                    command.run(client, message, args);
+                    command.run(client, message, args, connection);
                 } catch (err) {
                     if (err) return undefined;
                 }
             }
         )}
+        )}
 };