How can I get developer access or OAuth scope to test job creation on a trial account?

I’m currently testing an integration with ServiceM8 using a free trial account. I’m trying to create jobs via the /api_1.0/job.json endpoint as part of a custom automation flow. However, I’m receiving a 401 Unauthorized error unless I use endpoints that don’t require OAuth scope (e.g., allocationwindow.json with an API key).

I understand that job creation requires the create_jobs OAuth scope, but I’m unsure how to obtain developer access or how to generate a valid OAuth token for testing purposes during a trial.

Can you please advise on the correct process for getting:

Developer access or app registration
OAuth credentials for testing (Client ID/Secret)
The ability to test endpoints that require OAuth scopes on a free trial

Thanks in advance.

Zac Swalling
zac.swalling@linkupai.com.au