Angular5 POST request to Phoenix Frramework (api), send 422 (Unprocessable Entity)

@outlog

def create(conn, %{"enrollment" => enrollment_params}) do
    with {:ok, %Enrollment{} = enrollment} <- UME.create_enrollment(enrollment_params) do
      conn
      |> put_status(:created)
      |> put_resp_header("location", enrollment_path(conn, :show, enrollment))
      |> render("show.json", enrollment: enrollment)
    end
  end