Update bot.js, events/message.js, events/ready.js, settings.json.example,...

Update bot.js, events/message.js, events/ready.js, settings.json.example, .gitignore, commands/prefix.js files

.gitignore

-settings.json
+settings.json.example
 node_modules
\ No newline at end of file

bot.js

 const Discord = require('discord.js');
 const client = new Discord.Client();
-const ms = require('ms');
-const moment = require('moment');
 const ready = require('./events/ready');
 const message = require('./events/message');
 const settings = require('./settings.json');
 const fs = require('fs');
+const mysql = require('mysql');
 
+const connection = mysql.createConnection({
+  host     : settings.host,
+  user     : settings.user,
+  password : settings.password,
+  database : settings.database  
+})
+connection.connect(function(err) {
+  if (err) throw err;
+  console.log("Connected to MySQL");
+});
 
 client.commands = new Discord.Collection();
 client.aliases = new Discord.Collection();

commands/prefix.js

+const Discord = require('discord.js');
+exports.run = async(bot, message, args, connection) => {
+    let prefix = args[0];
+    let guildid= message.guild.id;
+    var sql = `SELECT prefix FROM guilds WHERE guildid='${guildid}'`;
+    connection.query(sql, function (err, result) {
+      if (result.length == 0) {
+        connection.query("INSERT INTO guilds (prefix,guildid) VALUES (?,?)", [prefix, guildid], function (err, result) {
+          message.channel.send(`Prefix is now ${prefix}`);
+        })
+      };
+      if (result.length == 1) {    
+        connection.query("UPDATE guilds SET prefix=? WHERE guildid=?", [prefix, guildid], function (err, result) {
+        if (err) throw err;
+        message.channel.send(`Prefix is now ${prefix}`);
+      });};
+    });
+};
+
+module.exports.help = {
+    name: 'prefix',
+    aliases: ['setprefix']
+};

events/message.js

 module.exports = {
 
-    message: (client, settings, Discord) => {
+    message: (client, settings, Discord, connection) => {
         client.on('message', async message => {
             if (message.content === '<@771043242242342962>') {
                 const tagged = new Discord.MessageEmbed()

events/ready.js

@@ -7,7 +7,7 @@ module.exports = {
         client.login(settings.token);
         client.on('ready', async () => {
             await client.user.setActivity('*yardım | *davet');
-            await client.user.setStatus('dnd');
+            await client.user.setStatus('online');
             console.log(`${client.user.tag} is ready!`);
 
         });

settings.json.example

 {
     "prefix": "PREFIX",
     "author": "AUTHOR ID",
-    "token": "YOUR TOKEN"
+    "token": "YOUR TOKEN",
+    "host": "HOST",
+    "user": "USER",
+    "password": "PASSWORD",
+    "database": "DATABASE"
 }
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