Migrate User-Model to 'new' iFile

[Gargamil]

User Story

As a:

Developer

I want:

to use the new iFile in User Model Profile Image // or use a separate Class for the user image (in this case: no migration needed)

Acceptance criteria:

• [ ] Either the new iFile is used or the iUser implements the current profile image

---

Please tag this issue if you are sure to which tag(s) it belongs.