To get a passkey challenge for a login flow, you need to initiate the login flow with the passkey method. In the Ory API, the

updateLoginFlow

method is used to update the login flow. This method requires a request body that includes the

method

and

csrf_token

properties. The

method

should be set to "passkey" when logging in using the Passkey strategy. Here is an example of the request body for the

updateLoginFlow

method with the Passkey strategy:

json {   'required': ['method', 'csrf_token'],    'type': 'object',    'description': 'Update Login Flow with Passkey Method',    'properties': {     'csrf_token': {       'description': 'Sending the anti-csrf token is only required for browser login flows.',        'type': 'string'     },      'method': {       'description': 'Method should be set to "passkey" when logging in using the Passkey strategy.',        'type': 'string'     },      'passkey_login': {       'description': 'Login a WebAuthn Security Key. This must contain the ID of the WebAuthN connection.',        'type': 'string'     }   } }

Please note that the

passkey_login

property must contain the ID of the WebAuthN connection. For more details, you can refer to the [Ory API Reference](https://www.ory.sh/docs/reference/api) or the [Kratos API Reference](https://www.ory.sh/docs/kratos/reference/api).

The

passkey_login

is a property that should contain the ID of the WebAuthN connection when logging in using the Passkey strategy. However, the provided knowledge sources do not provide specific information on how to obtain the

passkey_login

. It's likely that this ID is generated or provided when you set up a WebAuthN connection, but for the exact steps or method to get the

passkey_login

, I would recommend referring to the specific documentation or guides related to WebAuthN and your implementation of it. For more details on the Ory API and its methods, you can refer to the [Ory API Reference](https://www.ory.sh/docs/reference/api) or the [Kratos API Reference](https://www.ory.sh/docs/kratos/reference/api).

To proceed with the passkey login, you need to handle the response from the login flow request. The response contains a

ui

attribute which includes various nodes for different input fields required for the login process. Here is a basic example of how you might handle this in JavaScript:

javascript const response = await fetch('<http://localhost:4433/self-service/login/browser>', {   headers: {     'Content-Type': 'application/json',     'Accept': 'application/json'   },   credentials: 'include' });  const data = await response.json();  // Extract the action URL and method from the UI data const actionUrl = data.ui.action; const method = data.ui.method;  // Find the passkey input node const passkeyNode = data.ui.nodes.find(node => node.attributes.name === 'passkey_login');  // Now you can use this information to construct a form submission // For example, you might create a form element and submit it using JavaScript

Please note that this is a simplified example and you might need to adjust it based on your specific requirements and the structure of the

ui

data in the response. For more details on handling the login flow, you can refer to the [Ory Kratos documentation](https://www.ory.sh/docs/kratos/bring-your-own-ui/custom-ui-basic-integration#get-login-flow).

The

422 browser_location_change_required

error typically indicates that the browser needs to be redirected to a specific URL, often used in Social Sign In flows. This error might occur if the passkey method is not correctly set up or if the user does not have a passkey enabled. Unfortunately, the provided knowledge sources do not specify how to check if a user has a passkey enabled directly. However, you can infer this from the response of the

updateLoginFlow

method. If you get a successful response (HTTP 200) when you call this method with the passkey

method

and

csrf_token

, it means the user has a passkey enabled. If you get an error, it means the user does not have a passkey enabled or there is an issue with your request. For more details on the

updateLoginFlow

method and the possible responses, you can refer to the [Ory API Reference](https://www.ory.sh/docs/reference/api) or the [Kratos API Reference](https://www.ory.sh/docs/kratos/reference/api).