Task struct.
https://docs.dataforseo.com/v3/serp/google/organic/task_post/
t() :: %DataForSeo.Serp.Response{ cost: float(), status_code: integer(), status_message: String.t(), tasks: [DataForSeo.Serp.Task.t()], tasks_count: integer(), tasks_error: integer(), time: String.t(), version: String.t() }