Getting errors from json file and added ban command

commands/ban.js

+const errors = require('../errors.json');
+
+exports.run = async (client, message, args, connection) => {
+    if (!message.member.hasPermission('BAN_MEMBERS')) {
+        message.channel.send(errors.insufficient_permission_for_user);
+        return;
+    };
+
+    const user = message.mentions.users.first() || message.guild.members.cache.get(args[0]);
+    if (!user) {
+        message.channel.send(errors.insufficient_args)
+        return;
+    };
+
+    let reason = args.slice(1).join(' ');
+    if (reason == null) {
+        reason = "Unspecified."
+    };
+
+    if(message.guild.member(user).roles.highest.position >= message.member.roles.highest.position) {
+        message.channel.send(errors.equal_or_more_permission);
+        return;
+    };
+
+    if (!message.guild.member(user).bannable) {
+        message.channel.send(errors.insufficient_permission_for_bot);
+        return;
+    };
+    await message.guild.member(user).ban({reason: reason}).catch(e => {
+        message.channel.send(errors.unknown_error);
+        return;
+    });
+
+    message.channel.send('Successfully performed ban on specified user.');
+};
+
+module.exports.help = {
+    name: 'ban',
+    aliases: []
+};
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commands/eval.js

 const config = require('../config.json');
-
+const errors = require('../errors.json');
 exports.run = async (client, message, args, connection) => {
     if(!config.owner.includes(message.author.id)){
-        message.channel.send('You don\'t own this bot.')
+        message.channel.send('You don\'t own this bot.');
         return;
-    }
-
+    };
     try {
         const code = args.join(' ');
         if (!code) {
-            message.channel.send('You need to send what you want to run.');
+            message.channel.send(errors.insufficient_args);
             return;
         };
         const res = eval(code);
@@ -19,7 +18,7 @@ exports.run = async (client, message, args, connection) => {
     } catch (err) {
         message.channel.send(`\`Error:\` \`\`\`xl\n${err}\n\`\`\``);
     };
-}
+};
 module.exports.help = {
     name: 'eval',
     aliases: []

errors.json

+{
+    "insufficient_permission_for_user": "You don't have enough permission to run this command.",
+    "equal_or_more_permission": "You can't take action on members with equal or higher position.",
+    "insufficient_permission_for_bot": "I don't have enough permission.",
+    "unknown_error": "An error occurred while executing this command.",
+    "insufficient_args": "You must specify all required args"
+}
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