curl --request POST \
  --url https://api2.rhombussystems.com/api/oauth/updateApplication \
  --header 'Content-Type: application/json' \
  --header 'x-auth-apikey: <api-key>' \
  --header 'x-auth-scheme: <x-auth-scheme>' \
  --data '
{
  "clientId": "AAAAAAAAAAAAAAAAAAAAAA",
  "contactEmail": "admin@myapp.com",
  "description": "Integration app for accessing Rhombus API",
  "name": "My Integration App",
  "redirectUri": "https://myapp.com/oauth/callback",
  "tokenEndpointAuthMethod": "none"
}
'

import requests

url = "https://api2.rhombussystems.com/api/oauth/updateApplication"

payload = {
    "clientId": "AAAAAAAAAAAAAAAAAAAAAA",
    "contactEmail": "admin@myapp.com",
    "description": "Integration app for accessing Rhombus API",
    "name": "My Integration App",
    "redirectUri": "https://myapp.com/oauth/callback",
    "tokenEndpointAuthMethod": "none"
}
headers = {
    "x-auth-scheme": "<x-auth-scheme>",
    "x-auth-apikey": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'x-auth-scheme': '<x-auth-scheme>',
    'x-auth-apikey': '<api-key>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    clientId: 'AAAAAAAAAAAAAAAAAAAAAA',
    contactEmail: 'admin@myapp.com',
    description: 'Integration app for accessing Rhombus API',
    name: 'My Integration App',
    redirectUri: 'https://myapp.com/oauth/callback',
    tokenEndpointAuthMethod: 'none'
  })
};

fetch('https://api2.rhombussystems.com/api/oauth/updateApplication', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

HttpResponse<String> response = Unirest.post("https://api2.rhombussystems.com/api/oauth/updateApplication")
  .header("x-auth-scheme", "<x-auth-scheme>")
  .header("x-auth-apikey", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"clientId\": \"AAAAAAAAAAAAAAAAAAAAAA\",\n  \"contactEmail\": \"admin@myapp.com\",\n  \"description\": \"Integration app for accessing Rhombus API\",\n  \"name\": \"My Integration App\",\n  \"redirectUri\": \"https://myapp.com/oauth/callback\",\n  \"tokenEndpointAuthMethod\": \"none\"\n}")
  .asString();

{
  "error": true,
  "errorMsg": "<string>",
  "warningMsg": "<string>"
}