I want my bot to run on several servers with database - node.js

Question

so this code below works fine but the problem is I can't run it in all servers that have my bot I used quick.db but It seem to work only in one sever since it takes the last variable or I might did a mistake. Is there any way to change from quick.db to mongoDB so it work for all servers.
I hope I explain the issue successfully.
Code: what I am trying to do in this code is the bot will send a random messages from json file to a specific text channel specified by user which works fine, but I think I have a problem with the database.
discord.js v12
hosting the bot throw Heroku
index.js file
require('events').EventEmitter.prototype._maxListeners = 30;
const Discord = require('discord.js')
const client = new Discord.Client()
const ytdl = require('ytdl-core');
const config = require('./config.json')
const mongo = require('./mongo')
const command = require('./command')
const loadCommands = require('./commands/load-commands')
const commandBase = require('./commands/command-base')
const { permission, permissionError } = require('./commands/command-base')
const cron = require('node-cron')
const zkrList = require('./zkr.json')
const logo =
'URL HERE'
const db = require(`quick.db`)
const prefix = "!"
let cid;
client.on('ready', async () => {
await mongo().then((mongoose) => {
try {
console.log('Connected to mongo!')
} finally {
mongoose.connection.close()
}
})
console.log(`${client.user.tag} is online`);
console.log(`${client.guilds.cache.size} Servers`);
console.log(`Server Names:\n[ ${client.guilds.cache.map(g => g.name).join(", \n ")} ]`);
loadCommands(client)
cid = client.guilds.cache.map(guild => { db.get(`${guild.id}_channel_`) });
cron.schedule('*/10 * * * * *', () => {
const zkrRandom = zkrList[Math.floor(Math.random() * zkrList.length)]
const zkrEmbed = new Discord.MessageEmbed()
.setDescription(zkrRandom)
.setAuthor('XX', logo)
.setColor('#447a88')
client.channels.cache.get(cid).send(zkrEmbed);
})
client.on("message", async message => {
if (message.author.bot) {
return
}
console.log(client.guilds.cache.map(guild => { db.get(`${guild.id}_channel_`) }))
if (!message.member.hasPermission('ADMINISTRATOR') && message.content.startsWith('XX')) return message.reply('YOU DONT HAVE A PERMISSION TO RUN THIS COMMAND.')
if (!message.content.startsWith(prefix)) return;
const args = message.content.slice(prefix.length).trim().split(/ +/g)
const cmd = args[0]
if (cmd === "s") {
let c_id = args[1]
if (!c_id) return message.reply("YOU NEED TO MENTION A TEXT CHANNEL/ID")
c_id = c_id.replace(/[<#>]/g, '')
const channelObject = message.guild.channels.cache.get(c_id);
try { if (channelObject.type === 'voice') return message.reply('YOU CANNOT SEND MESSAGES TO VOICE CHANNEL') } catch (err) { return message.reply('AN ERROR OCCURRED') }
if (client.channels.cache.get(c_id)) {
client.guilds.cache.map(guild => { db.set(`${guild.id}_channel_`, c_id) })
message.reply(`SENDING TO THIS CHANNEL ${message.guild.channels.cache.get(c_id)}`);
cid = db.get(client.guilds.cache.map(guild => { db.get(`${guild.id}_channel_`) }))
const zkrRandom = zkrList[Math.floor(Math.random() * zkrList.length)]
const zkrEmbed = new Discord.MessageEmbed()
.setDescription(zkrRandom)
.setAuthor('XX', logo)
.setColor('#447a88')
client.channels.cache.get(cid).send(zkrEmbed);
} else {
return message.reply("NOT A VALID CHANNEL")
}
}
})
})
client.login(config.token)
zkr.json file
[
"MESSAGE 1",
"MESSAGE 2",
"MESSAGE 3"
]