Inviter of undefined - discord.js

Question

It says no inviter as an error, and when I can't find the inviter, I want it to send a message saying he logged in with the Url or unknown. What should I do?Normal users do not have a problem when they come with an invitation, but they give such an error when they log in with the Url.
Error: (node:244) UnhandledPromiseRejectionWarning: TypeError: Cannot
read property 'in viter' of undefined
at C:\Users\Administrator\Desktop\1951 Moderation + Registrar + Stats\bot.js :276:63
const invites = {};
const wait = require("util").promisify(setTimeout);
client.on("ready", () => {
wait(1000);
client.guilds.cache.forEach(g => {
g.fetchInvites().then(guildInvites => {
invites[g.id] = guildInvites;
});
});
});
client.on("guildMemberAdd", member => {
member.setNickname("• İsim ' Yaş");
member.setNickname("• İsim ' Yaş");
member.roles.add(ayarlar.kayıtsızRol)
member.roles.add(ayarlar.kayıtsızRol)
if (member.user.bot) return;
member.guild.fetchInvites().then(async guildInvites => {
const ei = invites[member.guild.id];
invites[member.guild.id] = guildInvites;
const invite = await guildInvites.find(
i => (ei.get(i.code) == null ? i.uses - 1 : ei.get(i.code).uses) < i.uses
);
const daveteden = member.guild.members.cache.get(invite.inviter.id);
db.add(`davet_${invite.inviter.id}_${member.guild.id}`, +1);
db.set(`bunudavet_${member.id}`, invite.inviter.id);
let davetsayiv2 = await db.fetch(
`davet_${invite.inviter.id}_${member.guild.id}`
);
let davetsayi;
if (!davetsayiv2) davetsayi = 0;
else
davetsayi = await db.fetch(
`davet_${invite.inviter.id}_${member.guild.id}`
);
let date = moment(member.user.createdAt)
const startedAt = Date.parse(date);
var msecs = Math.abs(new Date() - startedAt);
const years = Math.floor(msecs / (1000 * 60 * 60 * 24 * 365));
msecs -= years * 1000 * 60 * 60 * 24 * 365;
const months = Math.floor(msecs / (1000 * 60 * 60 * 24 * 30));
msecs -= months * 1000 * 60 * 60 * 24 * 30;
const weeks = Math.floor(msecs / (1000 * 60 * 60 * 24 * 7));
msecs -= weeks * 1000 * 60 * 60 * 24 * 7;
const days = Math.floor(msecs / (1000 * 60 * 60 * 24));
msecs -= days * 1000 * 60 * 60 * 24;
const hours = Math.floor(msecs / (1000 * 60 * 60));
msecs -= hours * 1000 * 60 * 60;
const mins = Math.floor((msecs / (1000 * 60)));
msecs -= mins * 1000 * 60;
const secs = Math.floor(msecs / 1000);
msecs -= secs * 1000;
var string = "";
if (years > 0) string += `${years} yıl ${months} ay`
else if (months > 0) string += `${months} ay ${weeks > 0 ? weeks+" hafta" : ""}`
else if (weeks > 0) string += `${weeks} hafta ${days > 0 ? days+" gün" : ""}`
else if (days > 0) string += `${days} gün ${hours > 0 ? hours+" saat" : ""}`
else if (hours > 0) string += `${hours} saat ${mins > 0 ? mins+" dakika" : ""}`
else if (mins > 0) string += `${mins} dakika ${secs > 0 ? secs+" saniye" : ""}`
else if (secs > 0) string += `${secs} saniye`
string = string.trim();
let guild = member.client.guilds.cache.get(ayarlar.SunucuID)
let log = guild.channels.cache.get(ayarlar.hosgeldinKanal);
let endAt = member.user.createdAt
let gün = moment(new Date(endAt).toISOString()).format('DD')
let ay = moment(new Date(endAt).toISOString()).format('MM').replace("01", "Ocak").replace("02", "Şubat").replace("03", "Mart").replace("04", "Nisan").replace("05", "Mayıs").replace("06", "Haziran").replace("07", "Temmuz").replace("08", "Ağustos").replace("09", "Eylül").replace("10", "Ekim").replace("11", "Kasım").replace("12", "Aralık")
let yıl = moment(new Date(endAt).toISOString()).format('YYYY')
let saat = moment(new Date(endAt).toISOString()).format('HH:mm')
let kuruluş = `${gün} ${ay} ${yıl} ${saat}`;
log.send(`
> :tada: **Adalet #1951** Sunucumuza hoş geldin ${member} seninle birlikte **${member.guild.memberCount}** üyeye ulaştık!
> ** **
> Hesabın **${kuruluş} (${string})** önce oluşturulmuş.
> ** **
> Sunucu kurallarımız <#896409238274965525> kanalında yazıyor sunucu kurallarına uymazsan cezalandırılırsın!
> ** **
> **Davet eden:** ${daveteden} \`${davetsayi}.\` davetini gerçekleştirdi.`)
})});
client.on("guildMemberRemove", async member => {
let davetçi = await db.fetch(`bunudavet_${member.id}`);
const daveteden = member.guild.members.cache.get(davetçi);
db.add(`davet_${davetçi}_${member.guild.id}`, -1);
})