title: Android) Application Signature of weChat developers. What value do I put in it?
body: <p>I want to get the wechat login data.
  Due to the problems of Application Signature, I had once failed.
  Please tell me how to put a value on what 'Application Signature'.
  Thanks.</p>
  
  <p><a href="https://i.stack.imgur.com/zbofC.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/zbofC.png" alt="enter image description here"></a></p>