req-perform-connection.md
In httr2: Perform HTTP Requests and Process the Responses

validates inputs

Code
  req_perform_connection(1)
Condition
  Error in `req_perform_connection()`:
  ! `req` must be an HTTP request object, not the number 1.
Code
  req_perform_connection(request_test(), 1)
Condition
  Error in `req_perform_connection()`:
  ! `blocking` must be `TRUE` or `FALSE`, not the number 1.

curl errors become errors

Code
  req_perform_connection(req)
Condition
  Error in `req_perform_connection()`:
  ! Failed to perform HTTP request.
  Caused by error in `open()`:
  ! Failed to connect