Install the plugin User Manager. It allows for re-sending confirmation e-mails.
After you installed and enabled the plugin go to Admin → User Manager, select the user(s) for whom you want to re-send the e-mail, select the action "Send Email Confirmation" from the drop-down and click "Apply".
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If you have a question about Q2A, please ask here, in English.
To report a bug, please create a new issue on Github or ask a question here with the bug tag.
If you just want to try Q2A, please use the demo site.