325 stograge entity is not exported correctly

[vildead]

The platform now contains correct value - name of the backend used for storage of the data

Users with access were not listed in the exported JSON. I have added both user and contact.

There will be more work needed:

1. exported JSON contains "storages", but in fact, these are exported from Accesses. If a storage is not set for Access instance, the record is not exported.
2. user and contact entity should be imho merged in some way. - e.g contact has fields first name and last name but for user, only full name is available

[vildead]

@jLebioda could you please confirm? This is just a quick fix of exporter so Valentin can continue with E2E. Thanks!

[jLebioda]

Looks good!
One comment though - is there any specific reason to call:

"pk": self.id.__str__(),

# instead of:
"pk": str(self.id),

# or 
"pk": f"{self.id}",

[vildead]

thanks

Looks good! One comment though - is there any specific reason to call:

"pk": self.id.__str__(),

# instead of:
"pk": str(self.id),

# or 
"pk": f"{self.id}",

Thanks for review @jacek