Create multiple developers

curl --request POST \
  --url http://localhost:8080/api/v1/developers/batch \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
[
  {
    "yapcoder_id": 123,
    "github_user_id": 123,
    "username": "<string>",
    "is_yapcoder": true,
    "onboarded_ts": "2023-11-07T05:31:56Z"
  }
]
'

{
  "message": "<string>"
}