I have a CodeIgniter application and I want access Google Contact API with OAuth solution. I want changes to be made in the Google Contact API when they are made in the database.
Already there is a Google account, have a client ID and client secret.
Please tell me what further steps should I take with Google Contacts and Google Developers Console.
Also, please tell me what files I need to add in Codeigniter and where to place them and the code I need to put in them.
I am new to Google API, CodeIgniter, PHP and web.