docs: update username system references

apps/guide/src/content/03-creating-your-bot/02-creating-the-main-file.mdx

@@ -27,7 +27,7 @@ const client = new Client({ intents: [GatewayIntentBits.Guilds] });
 // When the client is ready, run this code (only once)
 // We use 'c' for the event parameter to keep it separate from the already defined 'client'
 client.once(Events.ClientReady, (c) => {
-	console.log(`Ready! Logged in as ${c.user.tag}`);
+	console.log(`Ready! Logged in as ${c.user.username}`);
 });
 
 // Log in to Discord with your client's token

apps/guide/src/content/03-creating-your-bot/06-event-handling.mdx

@@ -40,7 +40,7 @@ for (const folder of commandFolders) {
 
 ```js ClientReady
 client.once(Events.ClientReady, (c) => {
-	console.log(`Ready! Logged in as ${c.user.tag}`);
+	console.log(`Ready! Logged in as ${c.user.username}`);
 });
 ```
 
@@ -145,7 +145,7 @@ export const data = {
 	once = true,
 };
 export async function execute(client) {
-	console.log(`Ready! Logged in as ${client.user.tag}`);
+	console.log(`Ready! Logged in as ${client.user.username}`);
 }
 ```
 

apps/guide/src/content/04-popular-topics/02-audit-logs.mdx

@@ -82,7 +82,7 @@ client.on(Events.GuildAuditLogEntryCreate, async (auditLog) => {
 	const target = await client.users.fetch(targetId);
 
 	// Log the output.
-	console.log(`A message by ${target.tag} was deleted by ${executor.tag} in ${channel}.`);
+	console.log(`A message by ${target.username} was deleted by ${executor.username} in ${channel}.`);
 });
 ```
 
@@ -104,7 +104,7 @@ client.on(Events.GuildAuditLogEntryCreate, async (auditLog) => {
 	const target = await client.users.fetch(targetId!);
 
 	// Log the output.
-	console.log(`A message by ${target.tag} was deleted by ${executor.tag} in ${channel}.`);
+	console.log(`A message by ${target.username} was deleted by ${executor.username} in ${channel}.`);
 });
 ```
 
@@ -135,7 +135,7 @@ client.on(Events.GuildAuditLogEntryCreate, async (auditLog) => {
 	const kickedUser = await client.users.fetch(targetId);
 
 	// Now you can log the output!
-	console.log(`${kickedUser.tag} was kicked by ${executor.tag}.`);
+	console.log(`${kickedUser.username} was kicked by ${executor.username}.`);
 });
 ```
 
@@ -156,7 +156,7 @@ client.on(Events.GuildAuditLogEntryCreate, async (auditLog) => {
 	const kickedUser = await client.users.fetch(targetId!);
 
 	// Now you can log the output!
-	console.log(`${kickedUser.tag} was kicked by ${executor.tag}.`);
+	console.log(`${kickedUser.username} was kicked by ${executor.username}.`);
 });
 ```
 

apps/guide/src/content/04-popular-topics/03-collectors.mdx

@@ -124,7 +124,7 @@ const collectorFilter = (reaction, user) => {
 const collector = message.createReactionCollector({ filter: collectorFilter, time: 15_000 });
 
 collector.on('collect', (reaction, user) => {
-	console.log(`Collected ${reaction.emoji.name} from ${user.tag}`);
+	console.log(`Collected ${reaction.emoji.name} from ${user.username}`);
 });
 
 collector.on('end', (collected) => {

apps/guide/src/content/05-additional-info/02-collections.mdx

@@ -28,8 +28,8 @@ Many of the methods on _`Collection`_ correspond to their namesake in _`Array`_.
 
 ```js
 // Assume we have an array of users and a collection of the same users.
-array.find((u) => u.discriminator === '1000');
-collection.find((u) => u.discriminator === '1000');
+array.find((user) => user.bot === true);
+collection.find((user) => user.bot === true);
 ```
 
 </CH.Code>
@@ -100,7 +100,7 @@ collection.last(2);
 
 // Removes anything that meets the condition from the collection.
 // Sort of like `filter`, but in-place.
-collection.sweep((user) => user.username === 'Bob');
+collection.sweep((user) => user.displayName === 'Bob');
 ```
 
 </CH.Code>