Imports empowerthings.com/cumulis/db/redisdb empowerthings.com/cumulis/security/rand empowerthings.com/cumulis/utils empowerthings.com/cumulis/utils/uuid golang.org/x/crypto/hkdf golang.org/x/crypto/pbkdf2 Standard library imports bytes crypto/sha1 crypto/sha256 encoding/base64 io time