GET a resource with authenticated credentials if available.
GET a resource with authenticated credentials if available.
Retrieve the data at a URL using an HTTP GET request using authentication credentials provided in a client certificate. Authenticated access depends on the suggested openssl package. If the openssl package is not installed, then the request falls back to an unauthenticated request, which may fail due to insufficient permissions. Configuration options for httr/RCurl can be passed using the normal config() mechanisms to generate a config option. Use httr_options() to see a complete list of available options.