diff --git a/routers/auto_signin_filter.go b/routers/auto_signin_filter.go
index 345a8583..fd0c6cd1 100644
--- a/routers/auto_signin_filter.go
+++ b/routers/auto_signin_filter.go
@@ -29,7 +29,13 @@ func AutoSigninFilter(ctx *context.Context) {
 
 	// GET parameter like "/page?access_token=123" or
 	// HTTP Bearer token like "Authorization: Bearer 123"
-	accessToken := util.GetMaxLenStr(ctx.Input.Query("accessToken"), ctx.Input.Query("access_token"), parseBearerToken(ctx))
+	accessToken := ctx.Input.Query("accessToken")
+	if accessToken == "" {
+		accessToken = ctx.Input.Query("access_token")
+	}
+	if accessToken == "" {
+		accessToken = parseBearerToken(ctx)
+	}
 
 	if accessToken != "" {
 		token, err := object.GetTokenByAccessToken(accessToken)
diff --git a/util/string.go b/util/string.go
index e3eb8843..fccc8848 100644
--- a/util/string.go
+++ b/util/string.go
@@ -187,32 +187,6 @@ func IsStringsEmpty(strs ...string) bool {
 	return false
 }
 
-func GetMaxLenStr(strs ...string) string {
-	m := 0
-	i := 0
-	for j, str := range strs {
-		l := len(str)
-		if l > m {
-			m = l
-			i = j
-		}
-	}
-	return strs[i]
-}
-
-func GetMinLenStr(strs ...string) string {
-	m := int(^uint(0) >> 1)
-	i := 0
-	for j, str := range strs {
-		l := len(str)
-		if l < m {
-			m = l
-			i = j
-		}
-	}
-	return strs[i]
-}
-
 func ReadStringFromPath(path string) string {
 	data, err := os.ReadFile(filepath.Clean(path))
 	if err != nil {
diff --git a/util/string_test.go b/util/string_test.go
index c3027e77..e2b74c48 100644
--- a/util/string_test.go
+++ b/util/string_test.go
@@ -189,45 +189,6 @@ func TestIsStrsEmpty(t *testing.T) {
 	}
 }
 
-func TestGetMaxLenStr(t *testing.T) {
-	scenarios := []struct {
-		description string
-		input       []string
-		expected    interface{}
-	}{
-		{"Should be return casdoor", []string{"", "casdoor", "casbin"}, "casdoor"},
-		{"Should be return casdoor_jdk", []string{"", "casdoor", "casbin", "casdoor_jdk"}, "casdoor_jdk"},
-		{"Should be return empty string", []string{""}, ""},
-	}
-	for _, scenery := range scenarios {
-		t.Run(scenery.description, func(t *testing.T) {
-			actual := GetMaxLenStr(scenery.input...)
-			assert.Equal(t, scenery.expected, actual, "The returned value not is expected")
-		})
-	}
-}
-
-func TestGetMinLenStr(t *testing.T) {
-	scenarios := []struct {
-		description string
-		input       []string
-		expected    interface{}
-	}{
-		{"Should be return casbin", []string{"casdoor", "casbin"}, "casbin"},
-		{"Should be return casbin", []string{"casdoor", "casbin", "casdoor_jdk"}, "casbin"},
-		{"Should be return empty string", []string{"a", "", "casbin"}, ""},
-		{"Should be return a", []string{"a", "casdoor", "casbin"}, "a"},
-		{"Should be return a", []string{"casdoor", "a", "casbin"}, "a"},
-		{"Should be return a", []string{"casbin", "casdoor", "a"}, "a"},
-	}
-	for _, scenery := range scenarios {
-		t.Run(scenery.description, func(t *testing.T) {
-			actual := GetMinLenStr(scenery.input...)
-			assert.Equal(t, scenery.expected, actual, "The returned value not is expected")
-		})
-	}
-}
-
 func TestSnakeString(t *testing.T) {
 	scenarios := []struct {
 		description string