Confused About Discord Invites: Are They Always Linked to the Original Creator?

client.on("guildMemberAdd", async (member) => {
  // To compare, we need to load the current invite list.
  const newInvites = await member.guild.invites.fetch()
  // This is the *existing* invites for the guild.
  const oldInvites = invites.get(member.guild.id);
  // Look through the invites, find the one for which the uses went up.
  const invite = newInvites.find(i => i.uses > oldInvites.get(i.code));
  // This is just to simplify the message being sent below (inviter doesn't have a tag property)
  const inviter = await client.users.fetch(invite.inviter.id);
  // Get the log channel (change to your liking)
  const logChannel = member.guild.channels.cache.find(channel => channel.name === "join-logs");
  // A real basic message with the information we need. 
  inviter
    ? logChannel.send(`${member.user.tag} joined using invite code ${invite.code} from ${inviter.tag}. Invite was used ${invite.uses} times since its creation.`)
    : logChannel.send(`${member.user.tag} joined but I couldn't find through which invite.`);
});

client.on("guildMemberAdd", async (member) => {
  // To compare, we need to load the current invite list.
  const newInvites = await member.guild.invites.fetch()
  // This is the *existing* invites for the guild.
  const oldInvites = invites.get(member.guild.id);
  // Look through the invites, find the one for which the uses went up.
  const invite = newInvites.find(i => i.uses > oldInvites.get(i.code));
  // This is just to simplify the message being sent below (inviter doesn't have a tag property)
  const inviter = await client.users.fetch(invite.inviter.id);
  // Get the log channel (change to your liking)
  const logChannel = member.guild.channels.cache.find(channel => channel.name === "join-logs");
  // A real basic message with the information we need. 
  inviter
    ? logChannel.send(`${member.user.tag} joined using invite code ${invite.code} from ${inviter.tag}. Invite was used ${invite.uses} times since its creation.`)
    : logChannel.send(`${member.user.tag} joined but I couldn't find through which invite.`);
});