Remove all users that are not admin users, also their created contents
```
Objective.objects.exclude(owner=None).delete()
Comment.objects.all().delete()
Assignment.objects.exclude(owner=None).exclude(owner__username="guru").delete()

User.objects.filter(is_superuser=False).delete()
```

Make local dump of database

```
./bin/dump_local_database.sh
```

Copy local dump to s3 bucket

```
aws s3 cp local.dump s3://skillbox-developer-bucket/
```

Get a presigned url from S3 for the dump (supposedly works from the command line, I had to use the S3 web UI)

```
aws s3 presign s3://bucket-name/dump.name
```

Load backup in heroku

```
heroku pg:backups:restore --app skillbox-preprod 'SIGNED URL' DATABASE_URL
```
