Is it possible to get the members from a security level with a plugin and JQL?

[PaulB]

I'm currently exploring the options to get the members from a security level from a security scheme.

I know for sure that the API does not let access to the list of user / groups inside security level from a security scheme.

I'm leanring how to create a plugin and I think I should do a Jira plugin with a JQL function module and a REST API module.

I'm unsure about the fact that I can get the value (members)  of a security level even through JQL, can someone clarify that for me?

If it is not possible, how can I access this kind of data through a plugin?