Logging in as a different user in SharePoint 2013 is Missing

In SharePoint 2013 Sign in as Different user is removed.

You can use sign in as different user  in 2 ways

Appent url with your Site URL  " /_layouts/closeConnection.aspx?loginasanotheruser=true"

Or 

Got to following path

C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\15\TEMPLATE\CONTROLTEMPLATES\

Find Welcome.ascx  Open it, in any Editor

Add Following Text In  above ID_RequestAccess Element.

<SharePoint:MenuItemTemplate runat="server" ID="ID_LoginAsDifferentUser"  

Text="<%$Resources:wss,personalactions_loginasdifferentuser%>"   

Description="<%$Resources:wss,personalactions_loginasdifferentuserdescription%>"   

MenuGroupId="100"   Sequence="100"   UseShortId="true"   />