chrome.identity.getAuthToken not working

Question

I am working with Chrome Identity API, to provide users with a Google Authentication on my Chrome Extension.

I followed the official tutorial of Google : link Chrome Identity API

• i added permissions to manifest.json and Client ID and Scopes
• to trigger the Authentification i added this code in my Background.js

chrome.identity.getAuthToken

The problem is when i execute the extension i am redirected to this login page

chrome://chrome-signin/?source=5

but after a successfull authentication i am redirected another time to the login page

what is the problem ?

Manifest.json

{
  "name": "My Extension",
  "short_name": "Ex App",
  "version": "0.1",
  "description": "description",
  "manifest_version": 2,
  "icons": { "128": "ICONE.png", "48": "ICONE1.png" },
  "permissions": ["contextMenus", "identity", "cookies", "http://*/*",   "https://*/*", "<all_urls>", "unlimitedStorage"],
  "browser_action": {
    "default_title": "Title",
    "default_icon": "imgIcone.png"
  },
  "oauth2": {
        "client_id": "xxxxxxx",
        "scopes": [
            "https://www.googleapis.com/auth/userinfo.email"
    ]   
},   

  "background": {
    "scripts": ["background.js"]
  },

    "content_scripts"   : [
{
  "matches": ["*://*.google.com/*"],
  "js": ["gadget/js/jquery.js","gadget/js/contactcard.js"],
  "css": ["gadget/css/contactcard.css"],
  "all_frames": true
  }],  

  "content_security_policy": "script-src 'self' 'unsafe-eval' https://apis.google.com/; object-src 'self'",
  "web_accessible_resources": ["img.png","gadget/css/contactcard.css","gadget/img/extension/crec.png"]
}

Background.js:

chrome.identity.getAuthToken({ 'interactive': true }, function(token) {
        // Use the token.
        console.log(token); 
            });

Answer 1

Problem Resolved !

the app ID of my Chrome extension does not match with my app ID in Google Console Developpers To avoid this upload first your Extension then copy the ID from Chrome and set it in the Google Console Developpers ! you must update it in Google console everytime you change it in Google Chrome