A library coded in Rust and hosted on crates.io for Uber's API. In particular, Uber Direct with their DaaS API.
In order for the code to work as shown in the main.rs, you need add a .sh file that contains:
cargo run -- --customer-id="xyz" --client-id="xyz" \ --client-secret="xyz"
At the time of writing, you need an valid Uber Direct API access. You can find the 'xyz' values on your profile.