i'm i supposed to generate a new license?
You can't. The keys are stored in a system that is only accessible with an Atlassian account.
You either need an account, or to get someone who has one to copy a key and send it to you.
i just created a free acoccount - how can i know it now?
Please take a look at this, link
https://confluence.atlassian.com/adminjiraserver/licensing-your-jira-applications-938847718.html
Log into my.atlassian.com , go to licences, and click "new evaluation".
If you want access to existing licences, you will need the owner to add you as a technical or billing contact on the licence.
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