//! Zeebe OAuth example
//!
//! In order to run the example call:
//!
//! ```sh
//! export ZEEBE_ADDRESS='[Zeebe API]'
//! export ZEEBE_CLIENT_ID='[Client ID]'
//! export ZEEBE_CLIENT_SECRET='[Client Secret]'
//! export ZEEBE_AUTHORIZATION_SERVER_URL='[OAuth API]'
//!
//! cargo run --example oauth
//! ```
use Client;
async