title: firebase login using power shell
body: <p>how do i login to firebase on windows power shell? i just started using firebase for app deployment. after i install firebase CLI using npm install -g firebase-tools and the installation was succeessful, but when i tried to login using firebase login in my site directory, i got this message</p>
  
  <p><strong>"PS C:\Users\Dennis\friendlychat\web-start> firebase login
  The term 'firebase' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
  At line:1 char:9
  + firebase &lt;&lt;&lt;&lt;  login
      + CategoryInfo          : ObjectNotFound: (firebase:String) [], CommandNotFoundException
      + FullyQualifiedErrorId : CommandNotFoundException"</strong></p>
  
  <p><em>note: i"ve set the environment path for nodejs and npm cmd are working></em></p>