Function wrap 

pub async fn wrap<E>(
    client: &impl Client,
    endpoint: E,
) -> Result<WrappedResponse<E>, ClientError>
where
    E: Endpoint,

Executes the given endpoint but requests that the Vault server to return a token wrapped response.

The token is stored in a WrappedResponse and the original response can be fetched using the unwrap method provided by the struct.