automatic user delete feature

Issue created by @nadja_stu

nadja_stu → committed d438be91 on 3506724-automatic-user-delete
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refactor: changed naming of settings on button #3506724
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nadja_stu → committed 24de4672 on 3506724-automatic-user-delete

feat: added tests for getDeletionSettings service #3506724

nadja_stu → committed be6563f8 on 3506724-automatic-user-delete

refactor: updated oop hooks to use di with the autowire service #3506724

nadja_stu → committed 4c802d29 on 3506724-automatic-user-delete
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test: added Test #3506724
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nadja_stu → committed 7ad03a8b on 3506724-automatic-user-delete
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docs: updated README.md #3506724
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nadja_stu → committed 93e678a7 on 3506724-automatic-user-delete
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docs: updated README.md #3506724
```

nadja_stu → committed 9a1fee39 on 3506724-automatic-user-delete
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docs: updated README.md #3506724
```

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