Add possibility to specify own LoginBaseUrl

[Kittiman]

There is a problem to use this module against a on-prem apiee installation. I suggest to add an option to specify customSSOUrl.
Meaning add this to the loginBaseUrl.js file.

module.exports = function getLoginBaseUrl(options) {
if (options.ssoZone) {
return 'https://' + options.ssoZone + '.login.apigee.com';
}
if (options.ssoUrl) {
return options.ssoUrl;
}
if (options.keyfile) {
return 'https://oauth2.googleapis.com/token';
}
if (options.customSSOUrl) {
return options.customSSOUrl;
}
return 'https://login.apigee.com';
};

[Kittiman]

I suggest to add the ssoUrl as an option to the utility.js file rather then my first suggestion.

[DinoChiesa]

hi,
I pushed a change to main branch with this change. I have not yet released an updated version with this change to npm.