Invalid auth error

ActionController::InvalidAuthenticityToken in MessagesController#create
please help me on this error.

I was following from part 1 until part 4 on group chat

Can you share the snippet of the code which is calling MessageController?

Thanks for replying Bilal. What is your username, full name or email address on Github so can add you to my repo

class MessagesController < ApplicationController
before_action :authenticate_user!
before_action :set_chatroom

def create
message = @chatroom.messages.new(message_params)
message.user = current_user
message.save
MessageRelayJob.perform_later(message)
end

private

def set_chatroom
  @chatroom = Chatroom.find(params[:chatroom_id])
end

def message_params
  params.require(:message).permit(:body)
end

end