What is my API endpoint for authenticating users programmatically with Zendesk

Hi there,

I am working on implementing SSO in Zendesk. I want to use Auth0 as identity provider. Currently, all user accounts are stored in Zendesk. In order to move to Auth0, I have to first migrate all user accounts into Auth0's database. I want to use Autho's automatic migration feature (see this for details: https://auth0.com/docs/manage-users/user-migration). As part of this, I need to know how to use Zendesk's API for user authentication. I tried to search for docs about this, but I couldn't find anything. My Zendesk URL is this: https://parsebiosciences1710795619.zendesk.com/ Can you point me to what API endpoint I could use to log in against this and also send me docs on how to authenticate the API requests?

Many thanks,

Iva