resume stdin only when reading email

lib/login.js

@@ -3,15 +3,13 @@ import fetch from 'node-fetch';
 import * as cfg from './cfg';
 import { stringify as stringifyQuery } from 'querystring';
 
-const stdin = process.openStdin();
-
 function readEmail () {
   return new Promise((resolve, reject) => {
     process.stdout.write('> Enter your email address: ');
-    stdin.on('data', (d) => {
-      stdin.destroy();
+    process.stdin.on('data', (d) => {
+      process.stdin.pause();
       resolve(d.toString().trim());
-    });
+    }).resume();
   });
 }