title: change sql server login username
body: <p>I have asp.net application that have a connection string using windows authentication.my system work in network domain.</p>
  
  <p>When I try to open application connection string use this <code>domain\Machin Name</code> for login.
  But I want change it to this <code>domain\MyUserName</code>,
  how I can do it?</p>