Login URL Generator
make_login_url(login_url)character; the package default login URL is
https://login.salesforce.com, but other URLs can be used. For example, if you
are logging into a sandbox environment, then the login URL should be set to
https://test.salesforce.com.
character; a complete URL (as a string) that will be used to
login to. This string is specific to your environment (production, sandbox,
etc.) and the API version being used.