POST `/auth/webauthn/login/begin`

Generate a login challenge and return it to the frontend for calling navigator.credentials.get().

WebAuthn `bearerAuth` application/json

Request Body

Schema: handler.beginLoginRequest

Field	Type	Required	Example	Constraints	Description
`password`	`string`	Yes		length: 1–?

Status	Description	Schema
200	Login options	`dto.WebAuthnLoginResponseWrapper`
401	Unauthorized	`dto.SimpleResponseWrapper`
500	Server error	`dto.SimpleResponseWrapper`

Field	Type	Required	Example	Constraints	Description
`code`	`integer`	No
`message`	`string`	No

Field	Type	Required
`id`	`string`	No
`transports`	array of string	No
`type`	`string`	No

Field	Type	Required
`allowCredentials`	array of See `dto.WebAuthnCredentialDescriptor`	No
`challenge`	`string`	No
`rpId`	`string`	No
`timeout`	`integer`	No
`userVerification`	`string`	No

Field	Type	Required	Example	Constraints	Description
`publicKey`	`dto.WebAuthnLoginOptionsResponse`	No

Field	Type	Required
`code`	`integer`	No
`data`	`dto.WebAuthnLoginResponse`	No
`message`	`string`	No
`timestamp`	`string`	No