Add script to force delete a user, in case of duplicates

Signed-off-by: Yohann D'ANELLO <ynerant@crans.org>
5 jobs for beta in 15 minutes and 54 seconds (queued for 7 minutes and 50 seconds)
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  Test
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py37-django22

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py38-django22

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passed #14480
py39-django22

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  Quality Assurance
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linters

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  Docs
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documentation

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