curl --request POST \
  --url https://20b9-41-90-209-232.ngrok-free.app/v1/payins/fee \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "target_currency": "NGN",
  "amount": 5000000
}
'

const url = 'https://20b9-41-90-209-232.ngrok-free.app/v1/payins/fee';
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({target_currency: 'NGN', amount: 5000000})
};

fetch(url, options)
  .then(res => res.json())
  .then(json => console.log(json))
  .catch(err => console.error(err));

import requests

url = "https://20b9-41-90-209-232.ngrok-free.app/v1/payins/fee"

payload = {
    "target_currency": "NGN",
    "amount": 5000000
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://20b9-41-90-209-232.ngrok-free.app/v1/payins/fee"

	payload := strings.NewReader("{\n  \"target_currency\": \"NGN\",\n  \"amount\": 5000000\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

{
  "object": "payin_fee",
  "currency": "NGN",
  "amount": 5000000,
  "partner_fee": 0,
  "margin": 5000,
  "fee": 5000,
  "credit_amount": 4995000,
  "scale": 2
}

{
  "error": {
    "type": "authentication_error",
    "code": "invalid_api_key",
    "message": "Invalid API key provided."
  }
}