Add convenience connectWithIndication() method.

api/src/main/java/com/velocitypowered/api/proxy/ConnectionRequestBuilder.java

@@ -24,6 +24,13 @@ public interface ConnectionRequestBuilder {
      */
     CompletableFuture<Result> connect();
 
+    /**
+     * Initiates the connection to the remote server and emits a result on the {@link CompletableFuture} after the user
+     * has logged on. Velocity's own built-in handling will be used to provide errors to the client.
+     * @return a {@link CompletableFuture} representing the status of this connection
+     */
+    CompletableFuture<Boolean> connectWithIndication();
+
     /**
      * Initiates the connection to the remote server without waiting for a result. Velocity will use generic error
      * handling code to notify the user.

proxy/src/main/java/com/velocitypowered/proxy/connection/client/ConnectedPlayer.java

@@ -467,8 +467,8 @@ public class ConnectedPlayer implements MinecraftConnectionAssociation, Player {
         }
 
         @Override
-        public void fireAndForget() {
-            connect()
+        public CompletableFuture<Boolean> connectWithIndication() {
+            return connect()
                     .whenCompleteAsync((status, throwable) -> {
                         if (throwable != null) {
                             handleConnectionException(server, throwable);
@@ -489,7 +489,13 @@ public class ConnectedPlayer implements MinecraftConnectionAssociation, Player {
                                 handleConnectionException(server, Disconnect.create(status.getReason().orElse(ConnectionMessages.INTERNAL_SERVER_CONNECTION_ERROR)));
                                 break;
                         }
-                    }, connection.eventLoop());
+                    }, connection.eventLoop())
+                    .thenApply(Result::isSuccessful);
+        }
+
+        @Override
+        public void fireAndForget() {
+            connectWithIndication();
         }
     }
 }