Requesting Custom Claims on your Access Token

You can now add your own custom fields on the access token that your receive from Cotter

Use Case

Let's say you have a user with attributes:

{
    "username": "helloworld",
    "role": "admin"
}

And you want to include this in Cotter's Access Token so that you can quickly access them in your API Middleware, you can now do this by calling an API request.

Request Custom Claims on Cotter's Access Token

POST https://www.cotter.app/api/v0/token/custom

Add Custom Claims to Cotter's original Access Token that you get when the user logs in.

Headers

Name	Type	Description
API_KEY_ID	string	Your API Key ID
API_SECRET_KEY	string	Your API Secret Key
Content-Type	string	application/json

Request Body

Name	Type	Description
refresh_token	string	A valid refresh token. If given, this endpoint will return a special refresh token where if used, will return access token and id token that have the custom attributes.
custom_attributes	object	a Dictionary of custom attributes that you want to add to the original token
token	string	Cotter's original access token (or id token)

200 The new access token with the additional attributes

{
  "token": "eyJhbGciOiJFUzI1NiIsImtpZCI6IlNQ..."
}

// OR, if refresh_token was included in the request body:
{
  "token": "eyJhbGciOiJFUzI1NiIsImtpZCI6IlNQ...",
  "refresh_tokenn": "1231:gawgawgaw4yaw....."
}

Example Request

POST https://www.cotter.app/api/v0/token/custom
Content-Type: application/json
API_KEY_ID: <API KEY ID>
API_SECRET_KEY: <API SECRET KEY>

 {
    "token": "eyJhbGciOiJFUzI1NiIsImtpZCI6I...", // The access token that you get when the user login with Cotter
    "custom_attributes": {                       // Additional attributes that you want to add to the original token
      "username": "helloworld",
      "role": "admin",
      "user_id": 125
    },
    "refresh_token": "1234:wfawgaw4gaw4gaw....." // (Optional) A valid refresh token, if given, will generate a new refresh token that will attach the custom attributes to new access tokens / id tokens   
 }

Persisting the Custom Claims

When you called this API with a refresh_token , the returned refresh_token can be used to generate new access_token and id_token that have the custom claims. This custom claims also persists through refresh token rotation that originates from the refresh_token that you receive from this API call.

To use this with the JS SDK, you can update the refresh_token stored in the user's browser using the JS SDK: Update Refresh Token (for Custom Claims)

Try it out at JWT.io

Request Body with the Original Access Token

Request Body

{
  "token": "eyJhbGciOiJFUzI1NiIsImtpZCI6IlNQQUNFX0pXVF9QVUJMSUM6NkNFRTRBMEUtM0M0Ny00ODk1LUFCNjYtRjhFMDc2MTE1MzJGIiwidHlwIjoiSldUIn0.eyJhdWQiOiJhNDQ3MTc5NC04ZWU4LTRkODgtYjMyMS01ZjdhMjI4MDNkNDMiLCJhdXRoZW50aWNhdGlvbl9tZXRob2QiOiJTT0NJQUxfTE9HSU4iLCJjbGllbnRfdXNlcl9pZCI6IjU1MjIyNjFhLWFjN2UtNGQ2ZS1iMDU2LTk1OWY2MTJmYjM0YSIsImV4cCI6MTU5OTE4MTIwMywiaWF0IjoxNTk5MTc3NjAzLCJpZGVudGlmaWVyIjoicHV0cmlAY290dGVyLmFwcCIsImlzcyI6Imh0dHBzOi8vd3d3LmNvdHRlci5hcHAiLCJqdGkiOiJkNDAzOWM2YS1kMWNiLTQ0YTItYjA0OC0xOGU1YmMxZTIxNmIiLCJzY29wZSI6ImFjY2VzcyIsInN1YiI6IjU1MjIyNjFhLWFjN2UtNGQ2ZS1iMDU2LTk1OWY2MTJmYjM0YSIsInR5cGUiOiJjbGllbnRfYWNjZXNzX3Rva2VuIn0.U0Qz0ezHN04QrGnPzn7WlYsR-5_94dQ0K4ovMhcUF4qhJMhEdGODkZGcaJ4ylCT7JqDP5REO2nK3W9mj6uAj5w",
  "custom_attributes": {                  
    "username": "helloworld",
    "role": "admin",
    "user_id": 125
  }   
}

Decoded Token

{
  "aud": "a4471794-8ee8-4d88-b321-5f7a22803d43",
  "authentication_method": "SOCIAL_LOGIN",
  "client_user_id": "5522261a-ac7e-4d6e-b056-959f612fb34a",
  "exp": 1599181203,
  "iat": 1599177603,
  "identifier": "[e-mail]",
  "iss": "https://www.cotter.app",
  "jti": "d4039c6a-d1cb-44a2-b048-18e5bc1e216b",
  "scope": "access",
  "sub": "5522261a-ac7e-4d6e-b056-959f612fb34a",
  "type": "client_access_token"
}

Response with the new Custom Attributes

JavaScript

{
  "token": "eyJhbGciOiJFUzI1NiIsImtpZCI6IlNQQUNFX0pXVF9QVUJMSUM6NkNFRTRBMEUtM0M0Ny00ODk1LUFCNjYtRjhFMDc2MTE1MzJGIiwidHlwIjoiSldUIn0.eyJhdWQiOlsiYTQ0NzE3OTQtOGVlOC00ZDg4LWIzMjEtNWY3YTIyODAzZDQzIl0sImV4cCI6MTU5OTE4MTIwMywiaWF0IjoxNTk5MTc3NjAzLCJpc3MiOiJodHRwczovL3d3dy5jb3R0ZXIuYXBwIiwianRpIjoiZDQwMzljNmEtZDFjYi00NGEyLWIwNDgtMThlNWJjMWUyMTZiIiwicm9sZSI6ImFkbWluIiwic3ViIjoiNTUyMjI2MWEtYWM3ZS00ZDZlLWIwNTYtOTU5ZjYxMmZiMzRhIiwidXNlcl9pZCI6MTI1LCJ1c2VybmFtZSI6ImhlbGxvd29ybGQifQ.O8te8naeRuYcXG6mLRc7FJ4a3TrBJlaJutzUCqJA8ncItAK9BKedV0TykLOhw_AmCAr-fz8bhbwi3XNUJmN8SQ"
}

Decoded Token

{
  "aud": "a4471794-8ee8-4d88-b321-5f7a22803d43",
  "authentication_method": "SOCIAL_LOGIN",
  "client_user_id": "5522261a-ac7e-4d6e-b056-959f612fb34a",
  "exp": 1599181203,
  "iat": 1599177603,
  "identifier": "[e-mail]",
  "iss": "https://www.cotter.app",
  "jti": "d4039c6a-d1cb-44a2-b048-18e5bc1e216b",
  "role": "admin",
  "scope": "access",
  "sub": "5522261a-ac7e-4d6e-b056-959f612fb34a",
  "type": "client_access_token",
  "user_id": 125,
  "username": "helloworld"
}