pub fn installation_access_token(
client: &Client,
api_base_url: &str,
credential: &SecretValue,
private_key: Option<&SecretValue>,
redactor: &mut Redactor,
) -> Result<String, ViaError>pub fn installation_access_token(
client: &Client,
api_base_url: &str,
credential: &SecretValue,
private_key: Option<&SecretValue>,
redactor: &mut Redactor,
) -> Result<String, ViaError>