curl --request POST \
  --url https://api.example.com/api/v1/auth/2fa/exchange \
  --header 'Content-Type: application/json' \
  --data '
{
  "challenge_token": "<string>",
  "code": "<string>"
}
'

{
  "access_token": "<string>",
  "refresh_token": "<string>",
  "token_type": "Bearer",
  "expires_in": 900
}