I have take the code from http://hayageek.com/login-with-google-plus-javascript-api/
I have implemented the code with my client_id, api key and also followed the instructions of invalid_client in google oauth2 but still I get the same error.
Also in the OAuth Consent Screen and mention the product name and email address
- That’s an error.
Error: invalid_client
Application: Project_Name
You can email the developer of this application at: email_address
no registered origin