Enrollments
To pull enrollments use the course_enrollment endpoint.
1519862400 is the unixtime (epoch) date for March 1, 2018 00:00:00. This returns a list of enrollments since then.
https://your-domain.com/course_enrollment.xml?created[ge]=1519862400
To get the name of the course, look up it up using the nid endpoint and pass nid as a parameter:
https://your-domain.com/node.xml?nid=2590
Credits
To pull credits use the course_credit_awarded endpoint.
1519862400 is the unixtime (epoch) date for March 1, 2018 00:00:00. This returns a list of credits awarded since then.
https://your-domain.com/course_credit_awarded.xml?created[ge]=1519862400
Completions
To pull completions use the course_report endpoint.
1519862400 is the unixtime (epoch) date for March 1, 2018 00:00:00. This returns a list of completions since then.
https://your-domain.com/course_report.xml?date_completed[gt]=1519862400