# Get the information to initiate a WebAuthn registration ceremony

**POST /V1/tfa/provider/u2fkey/authentication-challenge**

Get the information to initiate a WebAuthn registration ceremony


## Servers
- https://magento2.winkelstraat.mac/rest/all: https://magento2.winkelstraat.mac/rest/all ()



## Parameters



### Body:  (object)

- **username** (string)

- **password** (string)



## Responses
### 200
200 Success.

#### Body:  (object)
- **credential_request_options_json** (string)
  The needed data to initiate a WebAuthn registration ceremony
- **extension_attributes** (object)
  ExtensionInterface class for @see \Magento\TwoFactorAuth\Api\Data\U2fWebAuthnRequestInterface

### default
Unexpected error

#### Body:  (object)
- **message** (string)
  Error message
- **errors** (array[object])
  Error details
- **code** (integer)
  Error code
- **parameters** (array[object])
  Error parameters item
- **trace** (string)
  Stack trace


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