Study Collaborators have no access to the Study files

[odeimaiz]

Since the files belong to the Study owner, the collaborators or viewers don't have access to the study files

[pcrespov]

• access layer in storage is missing: storage does not know about sharing but only filters by user.
• WARNING: sharing a study should not automatically imply that the data is also shared. Separate access rights to different parts of a study e.g. fine graned on project properties and data
• Data belongs to the study but not to the user. If the study is shared wiht other users, the users have access to study and by extension to the data