src/Socialbox/SocialClient.php

@@ -613,6 +613,21 @@
             )->getResponse()->getResult();
         }
 
+        /**
+         * Authenticates the user by sending a remote procedure call request.
+         * Only applicable for server to server communication, this is the first method to call
+         * after connecting to the server.
+         *
+         * @return true Returns true if the authentication is successful.
+         * @throws RpcException Thrown if the RPC request fails.
+         */
+        public function authenticate(): true
+        {
+            return (bool)$this->sendRequest(
+                new RpcRequest(StandardMethods::AUTHENTICATE->value, Utilities::randomCrc32())
+            )->getResponse()->getResult();
+        }
+
         /**
          * Resolves a peer by its address or a PeerAddress instance through a remote procedure call.
          *

src/Socialbox/Socialbox.php

@@ -624,6 +624,7 @@
             try
             {
                 $client = new SocialClient(self::getServerAddress(), $domain);
+                $client->authenticate();
             }
             catch (Exception $e)
             {