def show

    customer_id = params[:customer_id]
    @user = User.find_by_id(customer_id)
    @merchant_customer = MerchantCustomer.find_by_customer_id(customer_id)
    @transactions = Transaction.where(user_id: customer_id).order(created_at: :desc)

    @conversations = @user.merchant_conversations
    @last_message_resolution = @user.message_resolutions.last

    @last_conversation = Conversation.find_last_conversation(@merchant_customer.merchant_id, 'user', @user.id)
    @last_conversation_ref = ConversationRef.find_last_conversation_ref(@last_conversation)
  end