How to migrate mnesia to mysql

[pworldx]

I have my roster and users stored in mnesia. I want to migrate it to MySQL. Is there any command to do it
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[chrzaszcz]

@pworldx There is no command to migrate roster and user data from Mnesia to MySQL. It would require a custom export function from Mnesia that is not present in MongooseIM.

There is a PR with such functionality: #2561, but the code got outdated because of low interest in the feature. Honestly, there is not much demand for it and the code would need to be rewritten. I am happy to reopen the issue if there is a volunteer.