code: func (s *AuthorizationsService) Get(ctx context.Context, id int64) (*Authorization, *Response, error) {
  	u := fmt.Sprintf("authorizations/%d", id)
  
  	req, err := s.client.NewRequest("GET", u, nil)
  	if err != nil {
  		return nil, nil, err
  	}
  
  	a := new(Authorization)
  	resp, err := s.client.Do(ctx, req, a)
  	if err != nil {
  		return nil, resp, err
  	}
  	return a, resp, nil
  }
docs: // Get a single authorization.
  //
  // GitHub API docs: https://developer.github.com/v3/oauth_authorizations/#get-a-single-authorization