diff --git a/.github/workflows/test_and_lint.yml b/.github/workflows/test_and_lint.yml
index 9f4355b..4125b15 100644
--- a/.github/workflows/test_and_lint.yml
+++ b/.github/workflows/test_and_lint.yml
@@ -18,12 +18,14 @@ jobs:
     steps:
       - name: Code
         uses: actions/checkout@v4
+
       - name: Install Go
         uses: actions/setup-go@v5
         with:
           go-version: '^1.23'
           cache: false
       - run: go get
+      - run: go install golang.org/x/tools/cmd/stringer
       - run: go generate ./...
       - run: go test -v -race ./...
 
@@ -32,15 +34,19 @@ jobs:
     steps:
       - name: Code
         uses: actions/checkout@v4
+
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          cache: false
           go-version: '^1.23'
+          cache: false
       - run: go get
+      - run: go install golang.org/x/tools/cmd/stringer
       - run: go generate ./...
+
       - name: Go vet
         run: go vet ./...
+
       - name: GolangCI-Lint
         uses: golangci/golangci-lint-action@v6
         with:
diff --git a/client/loginerror_string.go b/client/loginerror_string.go
new file mode 100644
index 0000000..7d302b1
--- /dev/null
+++ b/client/loginerror_string.go
@@ -0,0 +1,43 @@
+// Code generated by "stringer -type=LoginError"; DO NOT EDIT.
+
+package client
+
+import "strconv"
+
+func _() {
+	// An "invalid array index" compiler error signifies that the constant values have changed.
+	// Re-run the stringer command to generate them again.
+	var x [1]struct{}
+	_ = x[NeedCaptcha-1]
+	_ = x[OtherLoginError-3]
+	_ = x[UnsafeDeviceError-4]
+	_ = x[SMSNeededError-5]
+	_ = x[TooManySMSRequestError-6]
+	_ = x[SMSOrVerifyNeededError-7]
+	_ = x[SliderNeededError-8]
+	_ = x[UnknownLoginError - -1]
+}
+
+const (
+	_LoginError_name_0 = "UnknownLoginError"
+	_LoginError_name_1 = "NeedCaptcha"
+	_LoginError_name_2 = "OtherLoginErrorUnsafeDeviceErrorSMSNeededErrorTooManySMSRequestErrorSMSOrVerifyNeededErrorSliderNeededError"
+)
+
+var (
+	_LoginError_index_2 = [...]uint8{0, 15, 32, 46, 68, 90, 107}
+)
+
+func (i LoginError) String() string {
+	switch {
+	case i == -1:
+		return _LoginError_name_0
+	case i == 1:
+		return _LoginError_name_1
+	case 3 <= i && i <= 8:
+		i -= 3
+		return _LoginError_name_2[_LoginError_index_2[i]:_LoginError_index_2[i+1]]
+	default:
+		return "LoginError(" + strconv.FormatInt(int64(i), 10) + ")"
+	}
+}
diff --git a/client/oicq.go b/client/oicq.go
index 759c1d0..6ed346f 100644
--- a/client/oicq.go
+++ b/client/oicq.go
@@ -13,6 +13,8 @@ import (
 	tea "github.com/fumiama/gofastTEA"
 )
 
+// ref https://github.com/Mrs4s/MiraiGo/blob/54bdd873e3fed9fe1c944918924674dacec5ac76/client/entities.go#L18
+
 type (
 	LoginError int