It could be just one or two lines of code, like:

```Python
callback_url = "https://example.com/api/v1/invoices/events/"
httpx.post(callback_url, json={"description": "Invoice paid", "paid": True})
```

func Getpgid(pid int) (pgid int, err error) {
	r0, _, e1 := RawSyscall(SYS_GETPGID, uintptr(pid), 0, 0)
	pgid = int(r0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func Getpid() (pid int) {
	r0, _ := rawSyscallNoError(SYS_GETPID, 0, 0, 0)
	pid = int(r0)
	return
}

		if len(tags) < 1 {
			break // mismatched profile records and tags
		}

		// Deserialize the data in the profile buffer.
		recordLen := data[0]
		timestamp := data[1]
		ppid := data[2] >> 1
		if hasP := (data[2] & 0b1) != 0; !hasP {
			ppid = ^uint64(0)
		}
		goid := data[3]
		mpid := data[4]
		stk := data[5:recordLen]

		// Overflow records always have their headers contain
		// all zeroes.

CONFDIR="/tmp/rsync.k8s"
PIDFILE="${CONFDIR}/rsyncd.pid"
CONFFILE="${CONFDIR}/rsyncd.conf"
SECRETS="${CONFDIR}/rsyncd.secrets"

mkdir -p "${CONFDIR}"

if [[ -f "${PIDFILE}" ]]; then
  PID=$(cat "${PIDFILE}")
  echo "Cleaning up old PID file: ${PIDFILE}"
  kill "${PID}" &> /dev/null || true
  rm "${PIDFILE}"
fi

PASSWORD=$(</rsyncd.password)

cat <<EOF >"${SECRETS}"

limitations under the License.
*/

package authority

import (
	"crypto/ecdsa"
	"crypto/elliptic"
	"crypto/rand"
	"crypto/x509"
	"crypto/x509/pkix"
	"math/big"
	"net/url"
	"testing"
	"time"

	"github.com/google/go-cmp/cmp"
	"github.com/google/go-cmp/cmp/cmpopts"

	capi "k8s.io/api/certificates/v1"
	"k8s.io/apimachinery/pkg/util/diff"
)

// https://golang.org/src/crypto/tls/generate_cert.go.

package util

import (
	"crypto"
	"crypto/ecdsa"
	"crypto/elliptic"
	"crypto/rand"
	"crypto/rsa"
	"crypto/x509"
	"crypto/x509/pkix"
	"errors"
	"fmt"
	"os"
	"strings"

	"istio.io/istio/pkg/log"
)

// minimumRsaKeySize is the minimum RSA key size to generate certificates
// to ensure proper security
const minimumRsaKeySize = 2048

	return
}

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func callsetpgid(pid int, pgid int) (r1 uintptr, e1 Errno) {
	r1, _, e1 = rawSyscall6(uintptr(unsafe.Pointer(&libc_setpgid)), 2, uintptr(pid), uintptr(pgid), 0, 0, 0, 0)
	return
}

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func callsetsid() (r1 uintptr, e1 Errno) {

        this.environment = environment;
    }

    @Override
    public String getProcessIdentifier() {
        Long pid = environment.maybeGetPid();
        return pid == null ? "gradle" : String.valueOf(pid);
    }

    @Override
    public String getProcessDisplayName() {
        return "gradle";
    }

See the License for the specific language governing permissions and
limitations under the License.
*/

package approver

import (
	"context"
	"crypto/ecdsa"
	"crypto/elliptic"
	"crypto/x509"
	"crypto/x509/pkix"
	"encoding/pem"
	"fmt"
	"math/rand"
	"net"
	"testing"

	authorization "k8s.io/api/authorization/v1"
	capi "k8s.io/api/certificates/v1"
	"k8s.io/apimachinery/pkg/runtime"

	r0, _, _ := RawSyscall(SYS_GETGID, 0, 0, 0)
	gid = int(r0)
	return
}

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func Getpgid(pid int) (pgid int, err error) {
	r0, _, e1 := RawSyscall(SYS_GETPGID, uintptr(pid), 0, 0)
	pgid = int(r0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT