code: func (s *GistsService) Create(ctx context.Context, gist *Gist) (*Gist, *Response, error) {
  	u := "gists"
  	req, err := s.client.NewRequest("POST", u, gist)
  	if err != nil {
  		return nil, nil, err
  	}
  
  	g := new(Gist)
  	resp, err := s.client.Do(ctx, req, g)
  	if err != nil {
  		return nil, resp, err
  	}
  
  	return g, resp, nil
  }
docs: // Create a gist for authenticated user.
  //
  // GitHub API docs: https://developer.github.com/v3/gists/#create-a-gist