curl -X GET "https://api.fitsociety.io/public/v1/client-custom-fields" \
  -H "Authorization: Bearer <access_token>"

const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};

fetch('https://api.fitsociety.io/public/v1/client-custom-fields', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.fitsociety.io/public/v1/client-custom-fields"

headers = {"Authorization": "Bearer <token>"}

response = requests.get(url, headers=headers)

print(response.text)

{
  "data": {
    "customFields": [
      {
        "key": "<string>",
        "label": {
          "en": "<string>",
          "nl": "<string>"
        },
        "type": "<string>",
        "mode": "<string>",
        "order": 123,
        "placeholder": {
          "en": "<string>",
          "nl": "<string>"
        },
        "helpText": {
          "en": "<string>",
          "nl": "<string>"
        },
        "validation": {
          "minLength": 123,
          "maxLength": 123,
          "min": 123,
          "max": 123
        },
        "options": [
          {
            "value": "<string>",
            "label": {
              "en": "<string>",
              "nl": "<string>"
            },
            "order": 123
          }
        ]
      }
    ]
  },
  "meta": {
    "requestId": "4f849d7d-f4f1-45cc-b4b7-3984a3d17f83",
    "rateLimit": {
      "limit": 10,
      "remaining": 9,
      "resetSeconds": 1,
      "retryAfterSeconds": 1
    }
  }
}