Section II - manifest

Cargo.toml

First we need to include the dependent crates into the project. The crates we will need are roadrunner, base64, tokio-core, and rand. Add the following lines to the [dependencies] section in the Cargo.toml file

base64 = "0.10.1"
roadrunner = "0.1.1"
tokio-core = "0.1.17"
rand = "0.6.5"