IssueTracker

The client is trying to use the List api  to filter projects and remove projects starting with sys- followed by the next 26 digits using regex. They would like to know how to perform this operation without using * to represent the digits.

I was able to reproduce a test on the API by running the following filters to get my search result:
    -NOT projectId:sys-*
Output:
All cases that didn't have sys in the beginning of the string.

Solution:
The client wants a specific regex to filter out digits instead of *
^id:sys-[1-9]{26}$

Obstruction:

The API doesn’t accept any form or regular expressions beyond {*}.
It only accept the filters given in the example:
https://cloud.google.com/resource-manager/reference/rest/v1/projects/list?apix_params=%7B%22filter%22%3A%22projectId%3Awxl-*%22%2C%22pageSize%22%3A10%7D#query-parameters