diff --git a/client/entities.go b/client/entities.go
index 55346071..e88e5bac 100644
--- a/client/entities.go
+++ b/client/entities.go
@@ -296,6 +296,7 @@ type (
 	unit = struct{}
 )
 
+//go:generate stringer -type=LoginError
 const (
 	NeedCaptcha            LoginError = 1
 	OtherLoginError        LoginError = 3
diff --git a/client/loginerror_string.go b/client/loginerror_string.go
new file mode 100644
index 00000000..7d302b17
--- /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) + ")"
+	}
+}