Use AsyncPlayerPreLoginEvent instead of PlayerLoginEvent

because of its deprecation in Paper 1.21.6, this event disabled re-configuration APIs when a listener is registered for it; we don't want that to happen

build.gradle

@@ -1,5 +1,6 @@
 plugins {
     id 'java'
+    id("xyz.jpenilla.run-paper") version "2.3.1"
 }
 
 group = 'de.shiewk'
@@ -22,6 +23,15 @@ processResources {
     }
 }
 
+runServer {
+    minecraftVersion("1.21.7")
+    downloadPlugins {
+        // for testing from other client versions
+        modrinth("ViaVersion", "5.4.1")
+        modrinth("ViaBackwards", "5.4.1")
+    }
+}
+
 dependencies {
     compileOnly("io.papermc.paper:paper-api:1.21.3-R0.1-SNAPSHOT")
 }