curl --request POST \
  --url https://prod-auth.tktchurch.com/api/v1/families/join \
  --header 'Content-Type: application/json' \
  --data '
{
  "code": "<string>"
}
'

import Foundation

let parameters = ["code": "<string>"] as [String : Any?]

let postData = try JSONSerialization.data(withJSONObject: parameters, options: [])

let url = URL(string: "https://prod-auth.tktchurch.com/api/v1/families/join")!
var request = URLRequest(url: url)
request.httpMethod = "POST"
request.timeoutInterval = 10
request.allHTTPHeaderFields = ["Content-Type": "application/json"]
request.httpBody = postData

let (data, _) = try await URLSession.shared.data(for: request)
print(String(decoding: data, as: UTF8.self))

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({code: '<string>'})
};

fetch('https://prod-auth.tktchurch.com/api/v1/families/join', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://prod-auth.tktchurch.com/api/v1/families/join"

payload = { "code": "<string>" }
headers = {"Content-Type": "application/json"}

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

print(response.text)

{
  "family_id": "fam_01",
  "status": "member"
}

{
  "error": "invalid_request",
  "error_description": "Redirect URI not registered for this client"
}