def posts(quantity=0)
      query = "SELECT * FROM meme.posts(#{quantity}) WHERE owner_guid='#{self.guid}';"
      parse = Request.parse(query)
      if parse
        results = parse['query']['results']
        results.nil? ? nil : results['post'].map {|m| Post.new(m)}
      else
        parse.error!
      end
    end
def posts(quantity=0)
      query = "SELECT * FROM meme.posts(#{quantity}) WHERE owner_guid='#{self.guid}';"
      parse = Request.parse(query)
      if parse
        results = parse['query']['results']
        results.nil? ? nil : results['post'].map {|m| Post.new(m)}
      else
        parse.error!
      end
    end
Retrieves all posts of an user