add stringer for ErrorCodes (#11933)

cmd/stserrorcode_string.go

@@ -0,0 +1,32 @@
+// Code generated by "stringer -type=STSErrorCode -trimprefix=Err sts-errors.go"; DO NOT EDIT.
+
+package cmd
+
+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[ErrSTSNone-0]
+	_ = x[ErrSTSAccessDenied-1]
+	_ = x[ErrSTSMissingParameter-2]
+	_ = x[ErrSTSInvalidParameterValue-3]
+	_ = x[ErrSTSWebIdentityExpiredToken-4]
+	_ = x[ErrSTSClientGrantsExpiredToken-5]
+	_ = x[ErrSTSInvalidClientGrantsToken-6]
+	_ = x[ErrSTSMalformedPolicyDocument-7]
+	_ = x[ErrSTSNotInitialized-8]
+	_ = x[ErrSTSInternalError-9]
+}
+
+const _STSErrorCode_name = "STSNoneSTSAccessDeniedSTSMissingParameterSTSInvalidParameterValueSTSWebIdentityExpiredTokenSTSClientGrantsExpiredTokenSTSInvalidClientGrantsTokenSTSMalformedPolicyDocumentSTSNotInitializedSTSInternalError"
+
+var _STSErrorCode_index = [...]uint8{0, 7, 22, 41, 65, 91, 118, 145, 171, 188, 204}
+
+func (i STSErrorCode) String() string {
+	if i < 0 || i >= STSErrorCode(len(_STSErrorCode_index)-1) {
+		return "STSErrorCode(" + strconv.FormatInt(int64(i), 10) + ")"
+	}
+	return _STSErrorCode_name[_STSErrorCode_index[i]:_STSErrorCode_index[i+1]]
+}