xero API : Struggling to add a basic invoice
问题 Updated to show new code / new error @ 10/12/2020 11:30 I need to copy invoices from my website to xero using their API. I managed to get this working using the OAuth 1 but now need to update to OAuth2.0. I've installed xero-php-oauth2-starter which connects and works fine with the examples. e.g. if I click the example "Create one Contact" link, the demo contact is created in xero. As such, I know the link is working. I've been looking around trying to find an example of how to create an