diff --git a/mapping.properties b/mapping.properties
new file mode 100644
index 0000000..d576117
--- /dev/null
+++ b/mapping.properties
@@ -0,0 +1,4 @@
+# This contains the authorized repository=groupId where:
+# - repository is the repository where the extension is hosted
+# - groupId is the groupId of the extension
+quarkiverse-release/quarkus-slack=io.quarkiverse.slack
diff --git a/validate_repository.java b/validate_repository.java
index 786892d..73ada37 100644
--- a/validate_repository.java
+++ b/validate_repository.java
@@ -1,9 +1,27 @@
-import java.io.File;
+import java.io.FileInputStream;
+import java.util.Properties;
 
 public class validate_repository {
 
-    public static void main(String[] args) {
-        System.out.println(new File(System.getenv("ARTIFACT_DIR")).exists());
-        System.out.println("Hello, World");
+    public static void main(String[] args) throws Exception {
+//        Path artifactDir = Path.of(System.getenv("ARTIFACT_DIR"));
+        String repository = System.getenv("REPOSITORY");
+        String name = System.getenv("NAME");
+//        String version = System.getenv("VERSION");
+        // Verify if the repository pattern is valid
+        Properties prop = groupIdMapping();
+        // Check if the artifacts are from the authorized group Id
+        if (!prop.containsKey(repository)) {
+            throw new Exception("Unauthorized group Id");
+        }
+        //TODO: Perform other checks here
+    }
+
+    private static Properties groupIdMapping() throws Exception {
+        Properties prop = new Properties();
+        try (FileInputStream fis = new FileInputStream("mapping.properties")) {
+            prop.load(fis);
+        }
+        return prop;
     }
 }