https://medium.com/%E5%BD%BC%E5%BE%97%E6%BD%98%E7%9A%84-swift-ios-app-%E9%96%8B%E7%99%BC%E6%95%99%E5%AE%A4/swift-practice-99-twitter-api-%E4%B8%B2%E6%8E%A5-c99402a5d4d8
