pub async fn fetch_jwks( client: &Client, jwks_uri: &Url, ) -> Result<PublicJsonWebKeySet, JwksError>
Fetch a JWKS at the given URL.
http_client - The reqwest client to use for making HTTP requests.
http_client
jwks_uri - The URL where the JWKS can be retrieved.
jwks_uri
Returns an error if the request fails or if the data is invalid.