title: Restrict SQL Server Login access to only one database
body: <p>I have a <code>SQL Server</code> server which has around 50 databases on it. </p>
  
  <p>I wish to create a new <code>Login</code> for a client who wishes to have access to their database. </p>
  
  <p>But I don't want to give them access to the other <strong>49 databases</strong>.</p>
  
  <p>How can I do this?</p>