feat(docs): Implement LoginByProxyEvent on Paper

api/paper/src/main/java/me/adrianed/authmevelocity/api/paper/event/LoginByProxyEvent.java

@@ -0,0 +1,31 @@
+package me.adrianed.authmevelocity.api.paper.event;
+
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.player.PlayerEvent;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Event to be executed in case a player who has already logged
+ * into a previously configured server enters the server.
+ * 
+ * <p>AuthMeVelocity will automatically login this player.</p>
+ */
+public final class LoginByProxyEvent extends PlayerEvent {
+    private static final HandlerList HANDLER_LIST = new HandlerList();
+
+    /**
+     * Creates a new LoginByProxyEvent
+     * @param who the player to be logged in
+     */
+    public LoginByProxyEvent(@NotNull Player who) {
+        super(who, !Bukkit.isPrimaryThread());
+    }
+
+    @Override
+    public @NotNull HandlerList getHandlers() {
+        return HANDLER_LIST;
+    }
+    
+}

api/paper/src/main/java/me/adrianed/authmevelocity/api/paper/event/PreSendLoginEvent.java

@@ -9,9 +9,9 @@ import org.jetbrains.annotations.NotNull;
 
 /**
  * Event executed before a player is sent to another server after being logged in
- * <p>Here you have the possibility to cancel the player's sending
+ * <p>Here you have the possibility to cancel the player's sending</p>
 */
-public class PreSendLoginEvent extends PlayerEvent implements Cancellable {
+public final class PreSendLoginEvent extends PlayerEvent implements Cancellable {
     private static final HandlerList HANDLERS = new HandlerList();
     private boolean isCancelled = false;
 

paper/src/main/java/me/adrianed/authmevelocity/paper/listeners/MessageListener.java

@@ -7,6 +7,7 @@ import org.bukkit.entity.Player;
 import org.bukkit.plugin.messaging.PluginMessageListener;
 import org.jetbrains.annotations.NotNull;
 
+import me.adrianed.authmevelocity.api.paper.event.LoginByProxyEvent;
 import me.adrianed.authmevelocity.paper.AuthMeVelocityPlugin;
 
 import fr.xephi.authme.api.v3.AuthMeApi;
@@ -35,6 +36,7 @@ public class MessageListener implements PluginMessageListener {
             final String msg = input.readUTF();
             if ("LOGIN".equals(msg)) {
                 plugin.logDebug("PluginMessage | Login Message");
+                new LoginByProxyEvent(player).callEvent();
                 AuthMeApi.getInstance().forceLogin(player);
             }
         }