Ruby on Rails

NoMethodError (undefined method `email' for #<Pin:0x007fbec7e1ad60>):

  def create

    @pin = current_user.pins.build(pin_params)

  #  respond_to do |format|

      if @pin.save  ========> showing error at this line

         redirect_to @pin, notice: 'Pin was successfully created.'

      #  format.json { render :show, status: :created, location: @pin }

      else

        render  :new

      #  format.json { render json: @pin.errors, status: :unprocessable_entity }

      end

  #  end

  end

Thnaks in Advance