I transitioned from the JIRA trial to a subscription, and now I need to care about the number of users on my account. Initially I had made both an 'admin' and a 'user' account for myself. I want to get rid of one of them and only have a single admin account. JIRA won't let me delete either user because they both have created issues. Is there a way to merge them, or keep the issues around with an anonymous reporter/lead? What can I do?