From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sun, 18 Mar 2018 11:45:57 -0400
Subject: [PATCH] Ability to change PlayerProfile in AsyncPreLoginEvent

This will allow you to change the players name or skin on login.

diff --git a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
index 158862d2ea50a34dea10e074f3776bc5ed5a327f..fa949d01da7b6c1a489d17955108f7082f959c66 100644
--- a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
@@ -379,8 +379,16 @@ public class ServerLoginPacketListenerImpl implements TickablePacketListener, Se
                         java.util.UUID uniqueId = ServerLoginPacketListenerImpl.this.gameProfile.getId();
                         final org.bukkit.craftbukkit.CraftServer server = ServerLoginPacketListenerImpl.this.server.server;
 
-                        AsyncPlayerPreLoginEvent asyncEvent = new AsyncPlayerPreLoginEvent(playerName, address, uniqueId);
+                        // Paper start
+                        com.destroystokyo.paper.profile.PlayerProfile profile = org.bukkit.Bukkit.createProfile(uniqueId, playerName);
+                        AsyncPlayerPreLoginEvent asyncEvent = new AsyncPlayerPreLoginEvent(playerName, address, uniqueId, profile);
                         server.getPluginManager().callEvent(asyncEvent);
+                        profile = asyncEvent.getPlayerProfile();
+                        profile.complete();
+                        gameProfile = com.destroystokyo.paper.profile.CraftPlayerProfile.asAuthlibCopy(profile);
+                        playerName = gameProfile.getName();
+                        uniqueId = gameProfile.getId();
+                        // Paper end
 
                         if (PlayerPreLoginEvent.getHandlerList().getRegisteredListeners().length != 0) {
                             final PlayerPreLoginEvent event = new PlayerPreLoginEvent(playerName, address, uniqueId);