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C# / Auth0 Management API / Link a user account

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// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Chilkat.Http http = new Chilkat.Http();
bool success;

// Use this online tool to generate code from sample JSON: Generate Code to Create JSON

// The following JSON is sent in the request body.

// {
//   "provider": "",
//   "connection_id": "",
//   "user_id": "",
//   "link_with": ""
// }

Chilkat.JsonObject json = new Chilkat.JsonObject();

// Adds the "Authorization: Bearer {{auth0_token}}" header.
http.AuthToken = "{{auth0_token}}";

Chilkat.HttpResponse resp = http.PostJson3("https://{{auth0_domain}}/api/v2/users/:id/identities","application/json",json);
if (http.LastMethodSuccess == false) {


Curl Command

curl -X POST
	-H "Authorization: Bearer {{auth0_token}}"
	-H "Content-Type: application/json"
	-d '{
  "provider": "",
  "connection_id": "",
  "user_id": "",
  "link_with": ""

Postman Collection Item JSON

  "name": "Link a user account",
  "request": {
    "method": "POST",
    "header": [
        "key": "Authorization",
        "value": "Bearer {{auth0_token}}"
        "key": "Content-Type",
        "value": "application/json"
    "body": {
      "mode": "raw",
      "raw": "{\r\n  \"provider\": \"\",\r\n  \"connection_id\": \"\",\r\n  \"user_id\": \"\",\r\n  \"link_with\": \"\"\r\n}"
    "url": {
      "raw": "https://{{auth0_domain}}/api/v2/users/:id/identities",
      "protocol": "https",
      "host": [
      "path": [
      "variable": [
          "key": "id",
          "type": "any"
    "description": "Links the account specified in the body (<strong>secondary account</strong>) to the account specified by the <code>id</code> param of the URL (<strong>primary account</strong>).<br>There are two ways of invoking the endpoint:<br><ul><li>With the authenticated primary account's JWT in the Authorization header, which has the <code>update:current_user_identities</code> scope:\n<pre>\nPOST /api/v2/users/PRIMARY_ACCOUNT_USER_ID/identities\nAuthorization: \"Bearer PRIMARY_ACCOUNT_JWT\"\n{\n  \"link_with\": \"SECONDARY_ACCOUNT_JWT\"\n}\n</pre>In this case only the <code>link_with</code> param is required in the body, containing the JWT obtained upon the secondary account's authentication.</li><li>With an API V2 generated token with <code>update:users</code> scope:\n<pre>\nPOST /api/v2/users/PRIMARY_ACCOUNT_USER_ID/identities\nAuthorization: \"Bearer YOUR_API_V2_TOKEN\"\n{\n  \"provider\": \"SECONDARY_ACCOUNT_PROVIDER\",\n  \"connection_id\": \"SECONDARY_ACCOUNT_CONNECTION_ID(OPTIONAL)\",\n  \"user_id\": \"SECONDARY_ACCOUNT_USER_ID\"\n}\n</pre>In this case you need to send <code>provider</code> and <code>user_id</code> in the body. Optionally you can also send the <code>connection_id</code> param which is suitable for identifying a particular database connection for the 'auth0' provider.</li></ul>On successful linking, the endpoint returns the new array of the primary account identities."
  "response": [