16 refactor deprecated functions

Closes https://code.vereign.com/code/data-storage-agent/issues/16

handler/handler.go

@@ -28,7 +28,6 @@ import (
 	"code.vereign.com/code/viam-apis/authentication"
 	"code.vereign.com/code/viam-apis/key-storage-agent/api"
 	"code.vereign.com/code/viam-apis/utils"
-	"code.vereign.com/code/viam-apis/system"
 	"golang.org/x/net/context"
 	"google.golang.org/grpc/metadata"
 )
@@ -237,11 +236,9 @@ func (s *KeyStorageServerImpl) GetKeyId(ctx context.Context, in *api.GetKeyIdByK
 
 	keyIdResponse := &api.GetKeyIdByKeyResponse{}
 
-	stringMessage := &system.String{}
-	
-	hasData, errorsString, err := dataStorageClient.GetData(keyToKeyIdTable, in.PublicKey, stringMessage)
-	if err == nil && errorsString == "" && hasData {
-		keyIdResponse.KeyId = stringMessage.Value
+	keyId, errorsString, err := dataStorageClient.GetString(keyToKeyIdTable, in.PublicKey)
+	if err == nil && errorsString == "" && keyId != "" {
+		keyIdResponse.KeyId = keyId
 		return keyIdResponse, nil
 	} else {
 		if err != nil {