changed not and else

controllers/authGrpc.go

@@ -81,7 +81,7 @@ func grpcAuthorize(ctx context.Context) error {
 	}
 	emptynode := models.Node{}
 	node, err := functions.GetNodeByMacAddress(network, mac)
-	if !database.IsEmptyRecord(err) {
+	if database.IsEmptyRecord(err) {
 		if node, err = functions.GetDeletedNodeByMacAddress(network, mac); err != nil {
 			if !database.IsEmptyRecord(err) {
 				if functions.RemoveDeletedNode(node.ID) {
@@ -90,7 +90,8 @@ func grpcAuthorize(ctx context.Context) error {
 			}
 			return status.Errorf(codes.Unauthenticated, "Node does not exist.")
 		}
-	} else if err != nil || node.MacAddress == emptynode.MacAddress {
+	}
+	if err != nil || node.MacAddress == emptynode.MacAddress {
 		return status.Errorf(codes.Unauthenticated, "Node does not exist.")
 	}