curl --request POST \
  --url http://localhost:8000/auth/onboarding/certificate/upload \
  --header 'Content-Type: multipart/form-data' \
  --form 'onboarding_ticket=<string>' \
  --form 'password=<string>' \
  --form 'file=<string>' \
  --form next_step=certificate

{
  "current_step": "<string>",
  "data": {}
}