Recreate two tabs as it shown on screenshots:
airtable_paths_tab.png
airtable_users_tab.png
Import supplied workflow n8n.io_workflow.json
and update paths if needed.
N8n acts as a webhook server and Airtable serves as a database. Whenever clients access to N8n with a payload (acccess key) N8N search for mapped paths for this key in Airtable table.