# File lib/twitter/client/friendship.rb, line 28
  def friend(action, value)
    raise ArgumentError, "Invalid friend action provided: #{action}" unless @@FRIENDSHIP_URIS.keys.member?(action)
    value = value.to_i unless value.is_a?(String)
    uri = "#{@@FRIENDSHIP_URIS[action]}/#{value}.json"
    response = http_connect {|conn| create_http_post_request(uri) }
    bless_model(Twitter::User.unmarshal(response.body))
  end