You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: private_key.go
    path of file: ./repos/chainlink/core/services/keystore/keys/vrfkey
    
    the code of the file until where you have to start completion: package vrfkey

import (
	"encoding/json"
	"fmt"

	"github.com/ethereum/go-ethereum/accounts/keystore"
	"github.com/google/uuid"
	"github.com/pkg/errors"
	"go.dedis.ch/kyber/v3"

	"github.com/smartcontractkit/chainlink/v2/core/services/s
    
func Decrypt(e EncryptedVRFKey, auth string) (*PrivateKey, error) {
	// NOTE: We do this shuffle to an anonymous struct
	// solely to add a a throwaway UUID, so we can leverage
	// the keystore.DecryptKey from the geth which requires it
	// as of 1.10.0.
	keyJSON, err := json.Marshal(struct {
		Address string              `json:"address"`
		Crypto  keystore.CryptoJSON `json:"crypto"`
		Version int                 `json:"version"`
		Id      string              `json:"id"`
	}{
		Address: e.VRFKey.Address,
		Crypto:  e.VRFKey.Crypto,
		Version: e.VRFKey.Version,
		Id:      uuid.New().String(),
	})
	if err != nil {
		return nil, errors.Wrapf(err, "while marshaling key for decryption")
	}
	gethKey, err := keystore.DecryptKey(keyJSON, adulteratedPassword(auth))
	if err != nil {
		return nil, errors.Wrapf(err, "could not decrypt VRF key %s",
			e.PublicKey.String())
	}
	return fromGethKey(gethKey), nil
}