title: The return type of an async function must be the global Promise<T> type
body: <p><a href="https://i.stack.imgur.com/MhNuX.png" rel="noreferrer"><img src="https://i.stack.imgur.com/MhNuX.png" alt="enter image description here"></a></p>
  
  <p>Why does TSlint still says "The return type of an async function or method must be the global Promise type"?</p>
  
  <p>I can't understand what's wrong.</p>
  
  <p>UPDATED: 
  <a href="https://i.stack.imgur.com/wYwv5.png" rel="noreferrer"><img src="https://i.stack.imgur.com/wYwv5.png" alt="enter image description here"></a></p>