[1.7.10] Send chat message on player join a server

[Emax]

Hi, i'm developing a client mod i'm searching for a event that is called when the player join the server

and after he joins automatically send a chat message, i tried this code, but throw a NullPointerException when getting the player

 

	
       @SubscribeEvent
public void onConnectedToServerEvent(ClientConnectedToServerEvent event) {
	EntityClientPlayerMP player = Minecraft.getMinecraft().thePlayer;
        player.sendChatMessage("Hello!"); // <-- NullPointerException
}

[Emax]

i want to send chat message to the server so all other players can read it like a normal message

Thank you 

[Emax]

The method sendPacket(C01PacketChatMessage) is undefined for the type NetworkManager

 

	
       @SubscribeEvent
public void onConnectedToServerEvent(ClientConnectedToServerEvent event) {
	event.manager.sendPacket(new C01PacketChatMessage("Hi!"));
}