diff --git a/client/internal/auth/protocoltype_string.go b/client/internal/auth/protocoltype_string.go
new file mode 100644
index 00000000..538680f0
--- /dev/null
+++ b/client/internal/auth/protocoltype_string.go
@@ -0,0 +1,29 @@
+// Code generated by "stringer -type=ProtocolType -linecomment"; DO NOT EDIT.
+
+package auth
+
+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[Unset-0]
+	_ = x[AndroidPhone-1]
+	_ = x[AndroidWatch-2]
+	_ = x[MacOS-3]
+	_ = x[QiDian-4]
+	_ = x[IPad-5]
+	_ = x[AndroidPad-6]
+}
+
+const _ProtocolType_name = "UnsetAndroid PhoneAndroid WatchMacOS企点iPadAndroid Pad"
+
+var _ProtocolType_index = [...]uint8{0, 5, 18, 31, 36, 42, 46, 57}
+
+func (i ProtocolType) String() string {
+	if i < 0 || i >= ProtocolType(len(_ProtocolType_index)-1) {
+		return "ProtocolType(" + strconv.FormatInt(int64(i), 10) + ")"
+	}
+	return _ProtocolType_name[_ProtocolType_index[i]:_ProtocolType_index[i+1]]
+}