diff --git a/routers/authz_filter.go b/routers/authz_filter.go
index 223e73b5..1ad10d99 100644
--- a/routers/authz_filter.go
+++ b/routers/authz_filter.go
@@ -35,14 +35,14 @@ type Object struct {
 func getUsername(ctx *context.Context) (username string) {
 	defer func() {
 		if r := recover(); r != nil {
-			username = getUsernameByClientIdSecret(ctx)
+			username, _ = getUsernameByClientIdSecret(ctx)
 		}
 	}()
 
 	username = ctx.Input.Session("username").(string)
 
 	if username == "" {
-		username = getUsernameByClientIdSecret(ctx)
+		username, _ = getUsernameByClientIdSecret(ctx)
 	}
 
 	if username == "" {
diff --git a/routers/auto_signin_filter.go b/routers/auto_signin_filter.go
index fd0c6cd1..a5a9e120 100644
--- a/routers/auto_signin_filter.go
+++ b/routers/auto_signin_filter.go
@@ -45,19 +45,21 @@ func AutoSigninFilter(ctx *context.Context) {
 		}
 
 		if token == nil {
-			responseError(ctx, "Access token doesn't exist")
+			responseError(ctx, "Access token doesn't exist in database")
 			return
 		}
 
-		if util.IsTokenExpired(token.CreatedTime, token.ExpiresIn) {
-			responseError(ctx, "Access token has expired")
+		isExpired, expireTime := util.IsTokenExpired(token.CreatedTime, token.ExpiresIn)
+		if isExpired {
+			responseError(ctx, fmt.Sprintf("Access token has expired, expireTime = %s", expireTime))
 			return
 		}
 
 		userId := util.GetId(token.Organization, token.User)
 		application, err := object.GetApplicationByUserId(fmt.Sprintf("app/%s", token.Application))
 		if err != nil {
-			panic(err)
+			responseError(ctx, err.Error())
+			return
 		}
 
 		setSessionUser(ctx, userId)
@@ -66,7 +68,11 @@ func AutoSigninFilter(ctx *context.Context) {
 	}
 
 	// "/page?clientId=123&clientSecret=456"
-	userId := getUsernameByClientIdSecret(ctx)
+	userId, err := getUsernameByClientIdSecret(ctx)
+	if err != nil {
+		responseError(ctx, err.Error())
+		return
+	}
 	if userId != "" {
 		setSessionUser(ctx, userId)
 		return
diff --git a/routers/base.go b/routers/base.go
index d92572ed..4e246285 100644
--- a/routers/base.go
+++ b/routers/base.go
@@ -66,7 +66,7 @@ func denyRequest(ctx *context.Context) {
 	responseError(ctx, T(ctx, "auth:Unauthorized operation"))
 }
 
-func getUsernameByClientIdSecret(ctx *context.Context) string {
+func getUsernameByClientIdSecret(ctx *context.Context) (string, error) {
 	clientId, clientSecret, ok := ctx.Request.BasicAuth()
 	if !ok {
 		clientId = ctx.Input.Query("clientId")
@@ -74,19 +74,22 @@ func getUsernameByClientIdSecret(ctx *context.Context) string {
 	}
 
 	if clientId == "" || clientSecret == "" {
-		return ""
+		return "", nil
 	}
 
 	application, err := object.GetApplicationByClientId(clientId)
 	if err != nil {
-		panic(err)
+		return "", err
+	}
+	if application == nil {
+		return "", fmt.Errorf("Application not found for client ID: %s", clientId)
 	}
 
-	if application == nil || application.ClientSecret != clientSecret {
-		return ""
+	if application.ClientSecret != clientSecret {
+		return "", fmt.Errorf("Incorrect client secret for application: %s", application.Name)
 	}
 
-	return fmt.Sprintf("app/%s", application.Name)
+	return fmt.Sprintf("app/%s", application.Name), nil
 }
 
 func getUsernameByKeys(ctx *context.Context) string {
diff --git a/util/time.go b/util/time.go
index c386a3d3..f3ee60d6 100644
--- a/util/time.go
+++ b/util/time.go
@@ -58,8 +58,10 @@ func Time2String(timestamp time.Time) string {
 	return timestamp.Format(time.RFC3339)
 }
 
-func IsTokenExpired(createdTime string, expiresIn int) bool {
+func IsTokenExpired(createdTime string, expiresIn int) (bool, string) {
 	createdTimeObj, _ := time.Parse(time.RFC3339, createdTime)
 	expiresAtObj := createdTimeObj.Add(time.Duration(expiresIn) * time.Second)
-	return time.Now().After(expiresAtObj)
+	isExpired := time.Now().After(expiresAtObj)
+	expireTime := expiresAtObj.Local().Format(time.RFC3339)
+	return isExpired, expireTime
 }
diff --git a/util/time_test.go b/util/time_test.go
index 0a801a3b..900ff195 100644
--- a/util/time_test.go
+++ b/util/time_test.go
@@ -102,7 +102,7 @@ func Test_IsTokenExpired(t *testing.T) {
 		},
 	} {
 		t.Run(scenario.description, func(t *testing.T) {
-			result := IsTokenExpired(scenario.input.createdTime, scenario.input.expiresIn)
+			result, _ := IsTokenExpired(scenario.input.createdTime, scenario.input.expiresIn)
 			assert.Equal(t, scenario.expected, result, fmt.Sprintf("Expected %t, but was founded %t", scenario.expected, result))
 		})
 	}