For the Create Ticket call the user that you authenticate with needs to have this ability in the web interface, this correlates to what they can do with the API.
Good rule here is , if they can do it in the web interface they can do it via API.
Here is the call
Testing locally it is working. Here is an example of the call I made.
The parameters that need to be passed are
Please let me know if you have any more questions on this call. Thank you
Technical Support Specialist