Unprocessable Entity for IG login

[nicksmithr]

{"error": {"type": "UnprocessableEntity", "message": "An error occurred while validating the request parameters.", "link": null, "details": [{"parameter": "code", "error_type": "required", "errors": ["Missing data for required field."]}, {"parameter": "app_id", "error_type": "required", "errors": ["Missing data for required field."]}, {"parameter": "state", "error_type": "required", "errors": ["Missing data for required field."]}]}, "meta": {"version": "2.0.0-beta.0", "request_id": "b547c921-d188-40cd-c06f-a4b79eeaf19e", "status": 422}}

[janpio]

What exactly did you do to get this error?