Sketch of connection refusing system

build.gradle

@@ -0,0 +1,68 @@
+plugins {
+    id 'java'
+    id 'com.gradleup.shadow' version '8.3.5'
+    id 'io.papermc.paperweight.userdev' version '1.7.7'
+    id 'xyz.jpenilla.run-paper' version '2.3.1'
+}
+
+group = 'net.kuraczyk'
+version = '1.0-SNAPSHOT'
+
+repositories {
+    mavenCentral()
+    maven {
+        name = 'papermc'
+        url = 'https://repo.papermc.io/repository/maven-public/'
+    }
+    maven {
+        name = 'purpur'
+        url = 'https://repo.purpurmc.org/snapshots'
+    }
+}
+
+dependencies {
+    paperweight.paperDevBundle('1.21-R0.1-SNAPSHOT')
+    implementation 'org.postgresql:postgresql:42.7.7'
+    implementation 'org.flywaydb:flyway-core:10.7.2'
+    implementation 'org.flywaydb:flyway-database-postgresql:10.7.2'
+}
+
+shadowJar {
+    relocate 'org.postgresql', 'net.kuraczyk.libs.postgresql'
+    relocate 'org.flywaydb', 'net.kuraczyk.lib.flyway'
+    mergeServiceFiles()
+    archiveFileName.set("BanHammer-${project.version}.jar")
+}
+
+tasks.build.dependsOn(shadowJar)
+
+def targetJavaVersion = 21
+java {
+    def javaVersion = JavaVersion.toVersion(targetJavaVersion)
+    sourceCompatibility = javaVersion
+    targetCompatibility = javaVersion
+    if (JavaVersion.current() < javaVersion) {
+        toolchain.languageVersion = JavaLanguageVersion.of(targetJavaVersion)
+    }
+}
+
+tasks.withType(JavaCompile).configureEach {
+    options.encoding = 'UTF-8'
+
+    if (targetJavaVersion >= 10 || JavaVersion.current().isJava10Compatible()) {
+        options.release.set(targetJavaVersion)
+    }
+}
+
+processResources {
+    def props = [version: version]
+    inputs.properties props
+    filteringCharset 'UTF-8'
+    filesMatching('plugin.yml') {
+        expand props
+    }
+}
+
+tasks.named('runServer') {
+    minecraftVersion('1.21')
+}