title: How to log in in Sandbox Paypal Account?
body: <p>Paypal have recently changed their user interface in developers.paypal and as such, I couldn't find out the place from where I can log in to my old <em>SANDBOX</em> account.</p>
  
  <p>In the new developer.paypal.com, on the <em>Application</em> tab, I selected the <em>sandbox</em> account,</p>
  
  <p>In the following link,</p>
  
  <p><a href="https://developer.paypal.com/webapps/developer/applications/accounts" rel="noreferrer">https://developer.paypal.com/webapps/developer/applications/accounts</a></p>
  
  <p>I get a button "<em>login with paypal</em>". But when I try to login, it displays a message "<em>Invalid email</em>" even though my email and password are totally correct.</p>