What are the options when it comes to keeping extra user information about JIRA users? For example, suppose I want to allow users to add phone numbers, physical addresses etc. This information would then be accessible from issues associated with that user.
As an example, if a client were to open a support issue, I could call them using their phone number listed in extra user information.
I know a custom plugin could be written to provide this sort of behaviour - the question is are there any that already exist, or is there some other way to do it?