function simpleSSOLoginDisabled() {
  return (
    "SIMPLE_SSO_ENABLED" in process.env && "SIMPLE_SSO_NO_LOGIN" in process.env
  );
}
Checks if simple SSO login is disabled by checking if the
SIMPLE_SSO_NO_LOGIN environment variable is set as well as
SIMPLE_SSO_ENABLED is set.

This check should only be run when in multi-user mode when used.
@returns {boolean}