1. Go to the Google Developer Console.
2. In the Google Developers Console, click the Projects Menu
3. Click the New  Project  button
4. Enter your Project Name and click the Create button
5. Click the Enable APIs and Services link
6. Locate the Google Analytics API and click it
7. Enable it
8. Click Create Credentials button
   
9. Skip this  step
10. Click the Create Credentials and select OAuth client ID option
11. Click the Configure Consent Screen button
12. Enter your Application name
13. Enter your Dashboard domain to the Authorized domains and click the Save button
14. Select Web Application, enter Name and paste the Authorized redirect URIs from your dashboard
15. Click the Create button
16. Client ID and Secret Client will be displayed to you

Important Notes

If the process keeps failing for you, please try a different browser and be sure that any ad-blocker add-ons in your browser are disabled.