oauth2_server_validation_key
Specifies the location of the PEM-encoded public key, PEM-encoded certificate, or JSON Web Key Set (JWKS) to use for validating the OAuth 2.0 JWT access tokens presented by incoming connection requests. The value can be either the path to a file, or the URL of an HTTP(S) JWKS endpoint.
oauth2_server_validation_key =file_path
|URL
Refer to Validation Key Rotation Considerations for information about refreshing validation keys if a URL is specified.