Project Secret
Project Secret Authentication Details
Service Account
Service Account Authentication Details
Note that when you use Service Account authentication, you must specify the project_id as a parameter.
E.g.
curl https://data.mixpanel.com/api/2.0/nessie/pipeline/status \
-u "<serviceaccount_user>:<serviceaccount_secret>" \
-d name="<job_name>" \
-d project_id="<mixpanel_project_id>" \
-d summary="true"