Sign up from https://accounts.jenkins.io/ to create your account, and to subsequently manage it (e.g. update your password). This account gives you access to all our support infrastructure, such as JIRA and Wiki.
We're asking what you're using Jenkins for as an anti-spam measure only. We're not using that information for any purpose other than confirm you're a legitimate user. Try not to look like a (human) spammer when filling in that field.
Confluence apparently internally caches your profile information, which only expires after certain period of inactivity. So come back tomorrow morning and it should be good.
JIRA can only use our backend LDAP for authentication, and it stores your name and e-mail address separately. You can update it separately from here. In order to edit your profile just click on the small pencil in the top right corner of the details section.
You will need to send an email to the
googlegroups.com mail alias to help prove you are a human, and not a robot, or a (human) spammer. At a minimum, provide in the email the userid you tried to register with, as well as the version of Jenkins you currently are running.
Try to make your email look legitimate and not like it's written by someone who doesn't know anything or just read the jenkins.io home page. If we don't think your signup request is legitimate, it won't be approved. We're a popular target of human spammers, i.e. actual people with actual web browsers trying to post their spam in JIRA and the wiki.