def leave_image_comment(image, comment)
      configure_comment_connection
      Instagram.client.create_media_comment(image.external_identifier, comment)
    end
def leave_image_comment(image, comment)
      configure_comment_connection
      Instagram.client.create_media_comment(image.external_identifier, comment)
    end
Leave a comment containing the donor agreement on an Instagram image

 @param  image [type] An Image model object from the Instagram service

 @raise [Exception] If a comment submission fails
 @authenticated true

 @return [Hashie::Mash] Instagram response