<script type="text/javascript">
 window.applozic.init({
   appId: applozicApplicationKey,      //Get your application key from https://www.applozic.com
   userId: userId,                     //Logged in user's id, a unique identifier for user
   userName: username,                 //User's display name
   imageLink : '',                     //User's profile picture url
   email : '',                         //optional
   contactNumber: '',                  //optional, pass with internationl code eg: +13109097458
   desktopNotification: true,
   source: '1',                          // optional, WEB(1),DESKTOP_BROWSER(5), MOBILE_BROWSER(6)
   notificationIconLink: 'https://www.applozic.com/favicon.ico',    //Icon to show in desktop notification, replace with your icon
   authenticationTypeId: 1,          //1 for password verification from Applozic server and 0 for access Token verification from your server
   accessToken: '',                    //optional, leave it blank for testing purpose, read this if you want to add additional security by verifying password from your server https://www.applozic.com/docs/configuration.html#access-token-url
   locShare: true,
   googleApiKey: "AIzaSyDKfWHzu9X7Z2hByeW4RRFJrD9SizOzZt4",   // your project google api key 
   googleMapScriptLoaded : false,   // true if your app already loaded google maps script
   mapStaticAPIkey: "AIzaSyCWRScTDtbt8tlXDr6hiceCsU83aS2UuZw",
   autoTypeSearchEnabled : true,     // set to false if you don't want to allow sending message to user who is not in the contact list
   loadOwnContacts : false, //set to true if you want to populate your own contact list (see Step 4 for reference)
   olStatus: false,         //set to true for displaying a green dot in chat screen for users who are online
   onInit : function(response) {
      if (response === "success") {
         // login successful, perform your actions if any, for example: load contacts, getting unread message count, etc
      } else {
         // error in user login/register (you can hide chat button or refresh page)
      }
  },
  contactDisplayName: function(otherUserId) {
        //return the display name of the user from your application code based on userId.
        return "";
  },
  contactDisplayImage: function(otherUserId) {
        //return the display image url of the user from your application code based on userId.
        return "";
  },
  onTabClicked: function(response) {
        // write your logic to execute task on tab load
        //   object response =  {
        //    tabId : userId or groupId,
        //    isGroup : 'tab is group or not'
        //  }
  }
 });
</script>