title: How to change email account details in appcfg.py google appengine SDK
body: <p>I have hosted GAE apps with two different email ids! When i first time used appcfg.py to <code>update</code> my app then it prompted me for email id and password but later it doesnot. How to i change the saved email id and password? I tried to use <code>--email=</code> flag with appcfg.py, but it dint worked.</p>