You can use GitHub both to authorize to Hostman and as a source of your code. If you are signed up with GitHub, all publicly available repositories will be connected to your account and you can start deploying them.
Connecting private repositories
Click "Create" in the top left corner of your dashboard and choose the type of service you would like to create. If you don't want to create a service right now, just choose "Front-end app or static website."
In the bottom right corner of the window that opens, click "Connect another repository."
Choose GitHub repository in the next window and you will be redirected to the GitHub website. There you will need to authorize, then choose the repositories you want to connect.
Click "All repositories" or choose specific ones that you want to deploy. Click "Save" to complete the process and return to Hostman.