jpm install https://github.com/shofetim/salesforce
Set environment variables for your Salesforce Password, Security Token, Username, and URL, then test that you can login.
export SF_PASSWORD="your-password"
export SF_TOKEN="SF API Token"
export SF_USERNAME="your@@username"
export SF_URL="https://{projectname}.my.salesforce.com"
janet -e "(import salesforce :as sf) (pp (sf/login))"