How to generate Facebook Access Token for a pixel
Please follow the instructions here to generate the access token to set up Conversions API
Tutorial video:
Step 1: Go to Facebook Events Manager, make sure you login and choose your business account
Step 2: Choose the Pixel ID you want to set up conversion API
Step 3: Go to Settings, scroll down and click Generate access token under Conversions API section
Step 4: Copy the token appearing, make sure you save it somewhere else as Facebook won't store it.
Step 5: Paste the token access into our app