I’m trying to set up a subscription payment plan using Paypal since Stripe isn’t supported in my country. I saw in other forum discussions and YouTube videos that I need to use OAuth 2.0 but I am completely lost. How do I authenticate and get an access token? Here’s what I have so far from looking at other screenshots.
I finally got it to work, although when I logged in Paypal and went back to the redirect URI, I get this error concerning the header even though I do not have those values in my header.