I am trying to create a website where a user can sign up for the site (with a master username and password) and enter account information for various services, Google (anayltics, adwords) and non google (hootsuite).
Once they have created their account and logged in, it will take them to a custom page displaying their data from the various services.
I have created a Google Console Developer account and created the credentials (API keys, 0Auth2.0 client ids, and a service account.)
How I will access the users' custom data? The information I entered when setting up the credentials pertained to the server my website is hosted on. When I call the API won't I be getting data on my own website?
Which ID will I use to access the users' data like their Audience overview? Will I need their Google account information to be stored (username and password) or will username be enough? I haven't been able to find this information reading the beginners guides nor on YouTube.