curl --request POST \
  --url https://app.flextell.ai/api/v1/billing/subscription/plan-change \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'X-Tenant: <x-tenant>' \
  --data '
{
  "plan_code": "<string>"
}
'

import requests

url = "https://app.flextell.ai/api/v1/billing/subscription/plan-change"

payload = { "plan_code": "<string>" }
headers = {
    "X-Tenant": "<x-tenant>",
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'X-Tenant': '<x-tenant>',
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({plan_code: '<string>'})
};

fetch('https://app.flextell.ai/api/v1/billing/subscription/plan-change', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://app.flextell.ai/api/v1/billing/subscription/plan-change",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'plan_code' => '<string>'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json",
    "X-Tenant: <x-tenant>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

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

func main() {

	url := "https://app.flextell.ai/api/v1/billing/subscription/plan-change"

	payload := strings.NewReader("{\n  \"plan_code\": \"<string>\"\n}")

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

	req.Header.Add("X-Tenant", "<x-tenant>")
	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))

}

HttpResponse<String> response = Unirest.post("https://app.flextell.ai/api/v1/billing/subscription/plan-change")
  .header("X-Tenant", "<x-tenant>")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"plan_code\": \"<string>\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://app.flextell.ai/api/v1/billing/subscription/plan-change")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["X-Tenant"] = '<x-tenant>'
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"plan_code\": \"<string>\"\n}"

response = http.request(request)
puts response.read_body

{
  "success": "<string>",
  "data": {
    "proforma_invoice": {
      "id": 123,
      "tenant_id": 123,
      "number": "<string>",
      "kind": "<string>",
      "kind_label": "<string>",
      "subscription_plan_code": "<string>",
      "is_subscription_upgrade": true,
      "subscription_activation_pending": true,
      "subscription_upgrade_from_code": "<string>",
      "subscription_upgrade_period_end": "<string>",
      "status": "<string>",
      "status_label": "<string>",
      "currency": "<string>",
      "gross_amount": "<string>",
      "discount_amount": "<string>",
      "net_amount": "<string>",
      "tax_amount": "<string>",
      "total_amount": "<string>",
      "paid_amount": "<string>",
      "outstanding_amount": "<string>",
      "is_fully_paid": true,
      "is_overdue": true,
      "is_payable": "<string>",
      "is_pending_purchase": true,
      "purchase_expired": true,
      "period_start": "<string>",
      "period_end": "<string>",
      "issue_date": "<string>",
      "due_date": "<string>",
      "approved_at": "2023-11-07T05:31:56Z",
      "created_at": "2023-11-07T05:31:56Z",
      "updated_at": "2023-11-07T05:31:56Z",
      "checkout": {
        "can_pay": "<string>",
        "can_cancel_purchase": "<string>",
        "can_apply_discount": "<string>",
        "can_complete_without_payment": "<string>",
        "active_payment_id": 123,
        "blocked_error_code": "<string>",
        "blocked_message": "<string>"
      },
      "lines": [
        {
          "id": 123,
          "billing_quota_package_id": 123,
          "proforma_invoice_id": 123,
          "source": "<string>",
          "source_label": "<string>",
          "billing_type": "<string>",
          "billing_type_label": "<string>",
          "description": "<string>",
          "quantity": "<string>",
          "unit": "<string>",
          "unit_label": "<string>",
          "unit_price": "<string>",
          "gross_amount": "<string>",
          "discount_allocated": "<string>",
          "net_amount": "<string>",
          "tax_rate": "<string>",
          "tax_amount": "<string>",
          "line_total": "<string>",
          "period_start": "<string>",
          "period_end": "<string>",
          "sort_order": 123
        }
      ],
      "discount_applications": [
        {
          "status": "applied",
          "id": 123,
          "proforma_invoice_id": 123,
          "usage_type": "<string>",
          "usage_type_label": "<string>",
          "applied_amount": "<string>",
          "applied_at": "2023-11-07T05:31:56Z",
          "proforma_invoice_number": "<string>",
          "currency": "<string>",
          "discount": {
            "id": 123,
            "code": "<string>",
            "application_mode": "<string>",
            "name": "<string>",
            "discount_type": "<string>",
            "discount_type_label": "<string>",
            "value": "<string>"
          }
        }
      ],
      "payments": [
        {
          "id": 123,
          "proforma_invoice_id": 123,
          "method": "<string>",
          "method_label": "<string>",
          "gateway": "<string>",
          "status": "<string>",
          "status_label": "<string>",
          "failure_message": "<string>",
          "amount": "<string>",
          "refunded_amount": "<string>",
          "currency": "<string>",
          "masked_reference": "<string>",
          "completed_at": "2023-11-07T05:31:56Z",
          "created_at": "2023-11-07T05:31:56Z"
        }
      ]
    }
  }
}

{
  "message": "<string>"
}

{
  "message": "<string>"
}

{
  "message": "<string>",
  "errors": {}
}