diff --git a/common/registry/stub.go b/common/registry/stub.go
index 073ac67..d719c4d 100644
--- a/common/registry/stub.go
+++ b/common/registry/stub.go
@@ -50,7 +50,3 @@ func (s *stubReg) GetService(serviceName, version string) ([]Service, error) {
 func (s *stubReg) Name() string {
 	return "stub"
 }
-
-func key(service Service) string {
-	return service.Name + "-" + service.Version
-}
diff --git a/common/service/grpc_service.go b/common/service/grpc_service.go
index 69ac073..aff6ff1 100644
--- a/common/service/grpc_service.go
+++ b/common/service/grpc_service.go
@@ -5,11 +5,9 @@ import (
 	"net/http"
 	"time"
 
-	"github.com/google/uuid"
 	"github.com/grpc-ecosystem/go-grpc-prometheus"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 	"github.com/while-loop/levit/common/log"
-	levnet "github.com/while-loop/levit/common/net"
 	"github.com/while-loop/levit/common/registry"
 	"google.golang.org/grpc"
 )
@@ -31,19 +29,7 @@ func NewGrpcService(options Options) Service {
 		metrics(rpc, options.MetricsAddr)
 	}
 
-	if options.IP == "" {
-		options.IP = levnet.GetIP()
-	}
-
-	if options.Port <= 0 {
-		options.Port = 8080
-	}
-
-	if options.TTL == 0 {
-		options.TTL = 30 * time.Second
-	}
-
-	options.UUID = uuid.New().String()
+	options.applyDefaults()
 
 	s := &grpcService{rpc,
 		options,
diff --git a/common/service/options.go b/common/service/options.go
index d59bf87..fb928e6 100644
--- a/common/service/options.go
+++ b/common/service/options.go
@@ -3,6 +3,9 @@ package service
 import (
 	"fmt"
 	"time"
+
+	"github.com/google/uuid"
+	levnet "github.com/while-loop/levit/common/net"
 )
 
 type Options struct {
@@ -15,6 +18,21 @@ type Options struct {
 	TTL            time.Duration
 }
 
+func (o *Options) applyDefaults() {
+	if o.IP == "" {
+		o.IP = levnet.GetIP()
+	}
+
+	if o.Port <= 0 {
+		o.Port = 8080
+	}
+
+	if o.TTL == 0 {
+		o.TTL = 30 * time.Second
+	}
+
+	o.UUID = uuid.New().String()
+}
 func (o Options) laddr() string {
 	return fmt.Sprintf("%s:%d", o.IP, o.Port)
 }
diff --git a/users/cmd/usersd/main.go b/users/cmd/usersd/main.go
index 6d68791..65058b4 100644
--- a/users/cmd/usersd/main.go
+++ b/users/cmd/usersd/main.go
@@ -4,7 +4,6 @@ import (
 	"flag"
 	"strconv"
 	"strings"
-	"time"
 
 	"github.com/while-loop/levit/common/log"
 	"github.com/while-loop/levit/common/registry"
@@ -41,7 +40,6 @@ func main() {
 		ServiceName:    version.Name,
 		ServiceVersion: version.Version,
 		MetricsAddr:    ":8181",
-		TTL:            5 * time.Second,
 		IP:             parts[0],
 		Port:           int(port),
 	})