diff --git a/internal/context/sm_context.go b/internal/context/sm_context.go
index 714ab250..0215a504 100644
--- a/internal/context/sm_context.go
+++ b/internal/context/sm_context.go
@@ -411,7 +411,7 @@ func (smContext *SMContext) PDUAddressToNAS() ([12]byte, uint8) {
 
 // PCFSelection will select PCF for this SM Context
 func (smContext *SMContext) PCFSelection() error {
-	ctx, _, err := GetSelf().GetTokenCtx("nnrf-disc", "NRF")
+	ctx, _, err := GetSelf().GetTokenCtx(models.ServiceName_NNRF_DISC, "NRF")
 	if err != nil {
 		return err
 	}
diff --git a/internal/pfcp/handler/handler.go b/internal/pfcp/handler/handler.go
index 88b32519..109a1208 100644
--- a/internal/pfcp/handler/handler.go
+++ b/internal/pfcp/handler/handler.go
@@ -172,7 +172,7 @@ func HandlePfcpSessionReportRequest(msg *pfcpUdp.Message) {
 				},
 			}
 
-			ctx, _, err := smf_context.GetSelf().GetTokenCtx("namf-comm", models.NfType_AMF)
+			ctx, _, err := smf_context.GetSelf().GetTokenCtx(models.ServiceName_NAMF_COMM, models.NfType_AMF)
 			if err != nil {
 				logger.PfcpLog.Warnf("Get NAMF_COMM context failed: %s", err)
 				return
diff --git a/internal/sbi/consumer/nf_discovery.go b/internal/sbi/consumer/nf_discovery.go
index fd5fea3a..1b236a9f 100644
--- a/internal/sbi/consumer/nf_discovery.go
+++ b/internal/sbi/consumer/nf_discovery.go
@@ -15,7 +15,7 @@ import (
 )
 
 func SendNFDiscoveryUDM() (*models.ProblemDetails, error) {
-	ctx, pd, err := smf_context.GetSelf().GetTokenCtx("nnrf-disc", models.NfType_NRF)
+	ctx, pd, err := smf_context.GetSelf().GetTokenCtx(models.ServiceName_NNRF_DISC, models.NfType_NRF)
 	if err != nil {
 		return pd, err
 	}
@@ -61,7 +61,7 @@ func SendNFDiscoveryUDM() (*models.ProblemDetails, error) {
 }
 
 func SendNFDiscoveryPCF() (problemDetails *models.ProblemDetails, err error) {
-	ctx, pd, err := smf_context.GetSelf().GetTokenCtx("nnrf-disc", models.NfType_NRF)
+	ctx, pd, err := smf_context.GetSelf().GetTokenCtx(models.ServiceName_NNRF_DISC, models.NfType_NRF)
 	if err != nil {
 		return pd, err
 	}
@@ -101,7 +101,7 @@ func SendNFDiscoveryPCF() (problemDetails *models.ProblemDetails, err error) {
 }
 
 func SendNFDiscoveryServingAMF(smContext *smf_context.SMContext) (*models.ProblemDetails, error) {
-	ctx, pd, err := smf_context.GetSelf().GetTokenCtx("nnrf-disc", models.NfType_NRF)
+	ctx, pd, err := smf_context.GetSelf().GetTokenCtx(models.ServiceName_NNRF_DISC, models.NfType_NRF)
 	if err != nil {
 		return pd, err
 	}
diff --git a/internal/sbi/consumer/nf_management.go b/internal/sbi/consumer/nf_management.go
index d0d417c5..c1fa418e 100644
--- a/internal/sbi/consumer/nf_management.go
+++ b/internal/sbi/consumer/nf_management.go
@@ -106,7 +106,7 @@ func RetrySendNFRegistration(MaxRetry int) error {
 func SendNFDeregistration() error {
 	// Check data (Use RESTful DELETE)
 
-	ctx, _, err := smf_context.GetSelf().GetTokenCtx("nnrf-nfm", models.NfType_NRF)
+	ctx, _, err := smf_context.GetSelf().GetTokenCtx(models.ServiceName_NNRF_NFM, models.NfType_NRF)
 	if err != nil {
 		return err
 	}
@@ -136,7 +136,7 @@ func SendNFDeregistration() error {
 func SendDeregisterNFInstance() (*models.ProblemDetails, error) {
 	logger.ConsumerLog.Infof("Send Deregister NFInstance")
 
-	ctx, pd, err := smf_context.GetSelf().GetTokenCtx("nnrf-nfm", models.NfType_NRF)
+	ctx, pd, err := smf_context.GetSelf().GetTokenCtx(models.ServiceName_NNRF_NFM, models.NfType_NRF)
 	if err != nil {
 		return pd, err
 	}
diff --git a/internal/sbi/consumer/sm_policy.go b/internal/sbi/consumer/sm_policy.go
index cde88bb9..79a0491e 100644
--- a/internal/sbi/consumer/sm_policy.go
+++ b/internal/sbi/consumer/sm_policy.go
@@ -47,7 +47,7 @@ func SendSMPolicyAssociationCreate(smContext *smf_context.SMContext) (string, *m
 	}
 	smPolicyData.SuppFeat = "F"
 
-	ctx, _, err := smf_context.GetSelf().GetTokenCtx("npcf-smpolicycontrol", models.NfType_PCF)
+	ctx, _, err := smf_context.GetSelf().GetTokenCtx(models.ServiceName_NPCF_SMPOLICYCONTROL, models.NfType_PCF)
 	if err != nil {
 		return "", nil, err
 	}
@@ -148,7 +148,7 @@ func SendSMPolicyAssociationUpdateByUERequestModification(
 		}
 	}
 
-	ctx, _, err := smf_context.GetSelf().GetTokenCtx("npcf-smpolicycontrol", models.NfType_PCF)
+	ctx, _, err := smf_context.GetSelf().GetTokenCtx(models.ServiceName_NPCF_SMPOLICYCONTROL, models.NfType_PCF)
 	if err != nil {
 		return nil, err
 	}
@@ -374,7 +374,7 @@ func SendSMPolicyAssociationTermination(smContext *smf_context.SMContext) error
 		return errors.Errorf("smContext not selected PCF")
 	}
 
-	ctx, _, err := smf_context.GetSelf().GetTokenCtx("npcf-smpolicycontrol", models.NfType_PCF)
+	ctx, _, err := smf_context.GetSelf().GetTokenCtx(models.ServiceName_NPCF_SMPOLICYCONTROL, models.NfType_PCF)
 	if err != nil {
 		return err
 	}
diff --git a/internal/sbi/consumer/ue_context_management.go b/internal/sbi/consumer/ue_context_management.go
index 3196315e..b07b57cf 100644
--- a/internal/sbi/consumer/ue_context_management.go
+++ b/internal/sbi/consumer/ue_context_management.go
@@ -40,7 +40,7 @@ func UeCmRegistration(smCtx *smf_context.SMContext) (
 		" PduSessionId:", registrationData.PduSessionId, " SNssai:", registrationData.SingleNssai,
 		" Dnn:", registrationData.Dnn, " PlmnId:", registrationData.PlmnId)
 
-	ctx, pd, err := smf_context.GetSelf().GetTokenCtx("nudm-uecm", models.NfType_UDM)
+	ctx, pd, err := smf_context.GetSelf().GetTokenCtx(models.ServiceName_NUDM_UECM, models.NfType_UDM)
 	if err != nil {
 		return pd, err
 	}
@@ -81,7 +81,7 @@ func UeCmDeregistration(smCtx *smf_context.SMContext) (*models.ProblemDetails, e
 	configuration.SetBasePath(uecmUri)
 	client := Nudm_UEContextManagement.NewAPIClient(configuration)
 
-	ctx, pd, err := smf_context.GetSelf().GetTokenCtx("nudm-uecm", models.NfType_UDM)
+	ctx, pd, err := smf_context.GetSelf().GetTokenCtx(models.ServiceName_NUDM_UECM, models.NfType_UDM)
 	if err != nil {
 		return pd, err
 	}
diff --git a/internal/sbi/producer/datapath.go b/internal/sbi/producer/datapath.go
index c2149d35..167229b6 100644
--- a/internal/sbi/producer/datapath.go
+++ b/internal/sbi/producer/datapath.go
@@ -238,7 +238,7 @@ func sendPDUSessionEstablishmentReject(
 		},
 	}
 
-	ctx, _, err := smf_context.GetSelf().GetTokenCtx("namf-comm", models.NfType_AMF)
+	ctx, _, err := smf_context.GetSelf().GetTokenCtx(models.ServiceName_NAMF_COMM, models.NfType_AMF)
 	if err != nil {
 		logger.PduSessLog.Warnf("Get NAMF_COMM context failed: %s", err)
 		return
@@ -306,7 +306,7 @@ func sendPDUSessionEstablishmentAccept(
 		},
 	}
 
-	ctx, _, err := smf_context.GetSelf().GetTokenCtx("namf-comm", models.NfType_AMF)
+	ctx, _, err := smf_context.GetSelf().GetTokenCtx(models.ServiceName_NAMF_COMM, models.NfType_AMF)
 	if err != nil {
 		logger.PduSessLog.Warnf("Get NAMF_COMM context failed: %s", err)
 		return
diff --git a/internal/sbi/producer/pdu_session.go b/internal/sbi/producer/pdu_session.go
index 84249f59..cd0ad298 100644
--- a/internal/sbi/producer/pdu_session.go
+++ b/internal/sbi/producer/pdu_session.go
@@ -100,7 +100,7 @@ func HandlePDUSessionSMContextCreate(isDone <-chan struct{},
 
 	SubscriberDataManagementClient := smf_context.GetSelf().SubscriberDataManagementClient
 
-	ctx, _, oauthErr := smf_context.GetSelf().GetTokenCtx("nudm-sdm", models.NfType_UDM)
+	ctx, _, oauthErr := smf_context.GetSelf().GetTokenCtx(models.ServiceName_NUDM_SDM, models.NfType_UDM)
 	if oauthErr != nil {
 		smContext.Log.Errorf("Get Token Context Error[%v]", oauthErr)
 		return nil
@@ -1098,7 +1098,7 @@ func sendGSMPDUSessionReleaseCommand(smContext *smf_context.SMContext, nasPdu []
 	// Start T3592
 	t3592 := factory.SmfConfig.Configuration.T3592
 	if t3592.Enable {
-		ctx, _, err := smf_context.GetSelf().GetTokenCtx("namf-comm", models.NfType_AMF)
+		ctx, _, err := smf_context.GetSelf().GetTokenCtx(models.ServiceName_NAMF_COMM, models.NfType_AMF)
 		if err != nil {
 			smContext.Log.Warnf("Get namf-comm token failed: %+v", err)
 			return
@@ -1149,7 +1149,7 @@ func sendGSMPDUSessionModificationCommand(smContext *smf_context.SMContext, nasP
 	// Start T3591
 	t3591 := factory.SmfConfig.Configuration.T3591
 	if t3591.Enable {
-		ctx, _, err := smf_context.GetSelf().GetTokenCtx("namf-comm", models.NfType_AMF)
+		ctx, _, err := smf_context.GetSelf().GetTokenCtx(models.ServiceName_NAMF_COMM, models.NfType_AMF)
 		if err != nil {
 			smContext.Log.Warnf("Get namf-comm token failed: %+v", err)
 			return
diff --git a/pkg/association/association.go b/pkg/association/association.go
index 389d488f..0e834190 100644
--- a/pkg/association/association.go
+++ b/pkg/association/association.go
@@ -245,7 +245,7 @@ func requestAMFToReleasePDUResources(smContext *smf_context.SMContext) (sendNoti
 		}
 	}
 
-	ctx, _, err := smf_context.GetSelf().GetTokenCtx("namf-comm", models.NfType_AMF)
+	ctx, _, err := smf_context.GetSelf().GetTokenCtx(models.ServiceName_NAMF_COMM, models.NfType_AMF)
 	if err != nil {
 		return false, false
 	}