Type your preferred name for the collection.  ex: "Employee Collections"

Navigate to Airtable API Documentation and copy the curl. 

https://api.airtable.com/v0/appt0P29AmWWfB2kX/Employees 

Ignore the text after Table name (i.e. "?maxRecords=3&view=Grid%20view")

"https://api.airtable.com/v0/appt0P29AmWWfB2kX/Employees?maxRecords=3&view=Grid%20view"

Add the URL in "API Base URL" field in Adalo

Click "ADD ITEM" to add Authorization parameters

Click the "Authorization" field and type "Authorization"

refer Airtable API documentation for details.

Click the "show API key" field in Airtable API Documentation

Copy the Auth key "Bearer XXXX" as shown in screenshot

Add the copied Auth Key including "Bearer xxxx" and paste in Adalo, Value field and Click "DONE"

Click the "Is the results array nested under some key?" field and type "records" in the "Results Key" field. 

PUT https://api.airtable.com/v0/appt0P29AmWWfB2kX/Employees/{{id}}

Select PUT and change to PATCH. 

Airtable required PATCH as method to update the existing records. PUT will replace the data.

Connecting Airtable to Adalo using API