curl --request PATCH \
  --url https://{your-subdomain}.neetoinvoice.com/api/external/v1/projects/{project_id}/project_users/{project_user_id} \
  --header 'Content-Type: application/json' \
  --header 'X-Api-Key: <x-api-key>' \
  --data '
{
  "email": "oliver@example.com"
}
'

const options = {
  method: 'PATCH',
  headers: {'X-Api-Key': '<x-api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({email: 'oliver@example.com'})
};

fetch('https://{your-subdomain}.neetoinvoice.com/api/external/v1/projects/{project_id}/project_users/{project_user_id}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://{your-subdomain}.neetoinvoice.com/api/external/v1/projects/{project_id}/project_users/{project_user_id}"

payload = { "email": "oliver@example.com" }
headers = {
    "X-Api-Key": "<x-api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

{
  "project_user": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "user_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "role": "<string>",
    "hourly_rate": 123,
    "name": "<string>",
    "email": "jsmith@example.com",
    "time_zone": "<string>"
  }
}