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Consumer Authentication

/

API reference

/

OAuth

/

Attach

Attach OAuth factor

POST
https://test.stytch.com/v1/oauth/attach

Generate an OAuth Attach Token to pre-associate an OAuth flow with an existing Stytch User. Pass the returned oauth_attach_token to the same provider's OAuth Start endpoint to treat this OAuth flow as a login for that user instead of a signup for a new user.

Exactly one of user_id, session_token, or session_jwt must be provided to identify the target Stytch User.

Note: This is an optional step in the OAuth flow. Stytch can often determine whether to associate a new OAuth login with an existing User based on verified information (such as an email address) from the identity provider. This endpoint is useful for cases where we can't, such as missing or unverified provider information.

See our OAuth email address behavior resource for additional information.

Body parameters

provider* string
user_id string
session_token string
session_jwt string

Response fields

status_code int
request_id string
oauth_attach_token string
const stytch = require('stytch');

const client = new stytch.Client({
  project_id: 'PROJECT_ID',
  secret: 'SECRET',
});

const params = {
  provider: "microsoft",
  user_id: "user-test-16d9ba61-97a1-4ba4-9720-b03761dc50c6",
};

client.oauth.attach(params)
  .then(resp => { console.log(resp) })
  .catch(err => { console.log(err) });
RESPONSE
200
​
{
    "status_code": 200,
    "request_id": "request-id-test-b05c992f-ebdc-489d-a754-c7e70ba13141",
    "oauth_attach_token": "...",
}

Common Error Types

  • invalid_oauth_provider
  • no_user_selection_arguments