title: How to login to sandbox account?
body: <p>I would like to test my paypal payment.</p>
  
  <p>I have logged into <a href="https://developer.paypal.com/developer/accounts" rel="nofollow">https://developer.paypal.com/developer/accounts</a> and created two accounts</p>
  
  <p>1 - personal account for buyer account with user "mymail-buyer@..."
  2 - business account for seller with user "mymail-seller@..."</p>
  
  <p>I tried to use my website (which sells in the name of mymail-seller@...") and to buy as if I am paying with "mymail-buyer@..." account.</p>
  
  <p>However, I could not login.</p>
  
  <p>Moreover, I tried entering directly to paypal with buyer/seller accounts - NONE worked.</p>
  
  <p>How can I fix it?</p>