Rework usage of EncryptedStorage().activeUser

[Kharchevskyi]

Should be addressed in a separate ticket.

Originally posted by @Kharchevskyi in #437 (comment)

Consider possible solutions:

• Injecting encrypted storage
• Pass user as a parameter to fetchFolders

make the user object required

[tomholub]

This is probably outdated? You may close if so.

[sosnovsky]

Yes, we already have FoldersService with injected EncryptedStorageType