curl --request PUT \
  --url https://int-api.mx.com/users/{user_guid}/members/{member_guid} \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "member": {
    "background_aggregation_is_disabled": false,
    "credentials": [
      {
        "guid": "CRD-27d0edb8-1d50-5b90-bcbc-be270ca42b9f",
        "value": "password"
      }
    ],
    "id": "unique_id",
    "metadata": "\\\"credentials_last_refreshed_at\\\": \\\"2015-10-15\\",
    "skip_aggregation": false,
    "use_cases": [
      "PFM"
    ]
  }
}
'

import requests

url = "https://int-api.mx.com/users/{user_guid}/members/{member_guid}"

payload = { "member": {
        "background_aggregation_is_disabled": False,
        "credentials": [
            {
                "guid": "CRD-27d0edb8-1d50-5b90-bcbc-be270ca42b9f",
                "value": "password"
            }
        ],
        "id": "unique_id",
        "metadata": "\\"credentials_last_refreshed_at\\": \\"2015-10-15\",
        "skip_aggregation": False,
        "use_cases": ["PFM"]
    } }
headers = {
    "Authorization": "Basic <encoded-value>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PUT',
  headers: {Authorization: 'Basic <encoded-value>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    member: {
      background_aggregation_is_disabled: false,
      credentials: [{guid: 'CRD-27d0edb8-1d50-5b90-bcbc-be270ca42b9f', value: 'password'}],
      id: 'unique_id',
      metadata: '\"credentials_last_refreshed_at\": \"2015-10-15\',
      skip_aggregation: false,
      use_cases: ['PFM']
    }
  })
};

fetch('https://int-api.mx.com/users/{user_guid}/members/{member_guid}', 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://int-api.mx.com/users/{user_guid}/members/{member_guid}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PUT",
  CURLOPT_POSTFIELDS => json_encode([
    'member' => [
        'background_aggregation_is_disabled' => false,
        'credentials' => [
                [
                                'guid' => 'CRD-27d0edb8-1d50-5b90-bcbc-be270ca42b9f',
                                'value' => 'password'
                ]
        ],
        'id' => 'unique_id',
        'metadata' => '\\"credentials_last_refreshed_at\\": \\"2015-10-15\\',
        'skip_aggregation' => false,
        'use_cases' => [
                'PFM'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Basic <encoded-value>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($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://int-api.mx.com/users/{user_guid}/members/{member_guid}"

	payload := strings.NewReader("{\n  \"member\": {\n    \"background_aggregation_is_disabled\": false,\n    \"credentials\": [\n      {\n        \"guid\": \"CRD-27d0edb8-1d50-5b90-bcbc-be270ca42b9f\",\n        \"value\": \"password\"\n      }\n    ],\n    \"id\": \"unique_id\",\n    \"metadata\": \"\\\\\\\"credentials_last_refreshed_at\\\\\\\": \\\\\\\"2015-10-15\\\\\",\n    \"skip_aggregation\": false,\n    \"use_cases\": [\n      \"PFM\"\n    ]\n  }\n}")

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

	req.Header.Add("Authorization", "Basic <encoded-value>")
	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.put("https://int-api.mx.com/users/{user_guid}/members/{member_guid}")
  .header("Authorization", "Basic <encoded-value>")
  .header("Content-Type", "application/json")
  .body("{\n  \"member\": {\n    \"background_aggregation_is_disabled\": false,\n    \"credentials\": [\n      {\n        \"guid\": \"CRD-27d0edb8-1d50-5b90-bcbc-be270ca42b9f\",\n        \"value\": \"password\"\n      }\n    ],\n    \"id\": \"unique_id\",\n    \"metadata\": \"\\\\\\\"credentials_last_refreshed_at\\\\\\\": \\\\\\\"2015-10-15\\\\\",\n    \"skip_aggregation\": false,\n    \"use_cases\": [\n      \"PFM\"\n    ]\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://int-api.mx.com/users/{user_guid}/members/{member_guid}")

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

request = Net::HTTP::Put.new(url)
request["Authorization"] = 'Basic <encoded-value>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"member\": {\n    \"background_aggregation_is_disabled\": false,\n    \"credentials\": [\n      {\n        \"guid\": \"CRD-27d0edb8-1d50-5b90-bcbc-be270ca42b9f\",\n        \"value\": \"password\"\n      }\n    ],\n    \"id\": \"unique_id\",\n    \"metadata\": \"\\\\\\\"credentials_last_refreshed_at\\\\\\\": \\\\\\\"2015-10-15\\\\\",\n    \"skip_aggregation\": false,\n    \"use_cases\": [\n      \"PFM\"\n    ]\n  }\n}"

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

{
  "member": {
    "aggregated_at": "2016-10-13T18:07:57.000Z",
    "background_aggregation_is_disabled": false,
    "connection_status": "CONNECTED",
    "connection_status_message": "Connected to MX Bank",
    "guid": "MBR-7c6f361b-e582-15b6-60c0-358f12466b4b",
    "id": "unique_id",
    "institution_code": "mxbank",
    "institution_guid": "INST-12345678-90ab-cdef-1234-567890abcdef",
    "is_being_aggregated": false,
    "is_managed_by_user": false,
    "is_manual": false,
    "is_oauth": false,
    "metadata": "\\\"credentials_last_refreshed_at\\\": \\\"2015-10-15\\",
    "most_recent_job_detail_code": null,
    "most_recent_job_detail_text": null,
    "most_recent_job_guid": "JOB-12345678-90ab-cdef-1234-567890abcdef",
    "name": "MX Bank",
    "needs_updated_credentials": false,
    "oauth_window_uri": "https://mxbank.mx.com/oauth/authorize?client_id=b8OikQ4Ep3NuSUrQ13DdvFuwpNx-qqoAsJDVAQCyLkQ&redirect_uri=https%3A%2F%2Fint-app.moneydesktop.com%2Foauth%2Fredirect_from&response_type=code&scope=openid&state=d745bd4ee6f0f9c184757f574bcc2df2",
    "successfully_aggregated_at": "2016-10-13T17:57:38.000Z",
    "use_cases": [
      "PFM"
    ],
    "user_guid": "USR-fa7537f3-48aa-a683-a02a-b18940482f54",
    "user_id": "user123"
  }
}