title: provide credentials in nuget command line parameters
body: <p>We have an nuget server hosted in azure that only allow certain people to create packages.</p>
  <p>If I run nuget command line, I get asked to provide username and password. Is there a possibility to provide username and password in command line?</p>
  <p>I tried something such as -User or -UserName, but I get <code>Unknown option: '-User'</code></p>
  <pre><code>nuget push -Source &quot;XXX&quot; -ApiKey VSTS -noninteractive mypackage.*.nupkg -User myUsername
  </code></pre>
  <p>Is there a way to provide credentials from command line?</p>