I use a site called mojng-jira (bugs.mojang.com). In the process of changing the cell phone, the two-factor authentication token disappeared. I can't log in because I've lost my reserve key. What should I do in this case?
@Seungyun Lee welcome to the Atlassian community
You will need to contact Atlassian support. https://support.atlassian.com/atlassian-account/docs/manage-two-step-verification-for-your-atlassian-account/
You can contact them here: https://support.atlassian.com/contact/
If you need help contacting them I can escalate this issue to them.
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