Group Channel/ iOS-Share encrypted files

[octa-george]

Members can share encrypted files with a master key saved on sendbird server. This encrypted file has its own access URL, and only member with the master key can decrypt the file and open it.

[YogeshVeer]

@chrischabot @octa-george I believe this can achieved via Dashboard or some API since I could not find any in docs. Please confirm and close if that is the case.