code: func (s *ReactionsService) CreateTeamDiscussionReaction(ctx context.Context, teamID int64, discussionNumber int, content string) (*Reaction, *Response, error) {
  	u := fmt.Sprintf("teams/%v/discussions/%v/reactions", teamID, discussionNumber)
  
  	body := &Reaction{Content: String(content)}
  	req, err := s.client.NewRequest("POST", u, body)
  	if err != nil {
  		return nil, nil, err
  	}
  
  	req.Header.Set("Accept", mediaTypeReactionsPreview)
  
  	m := &Reaction{}
  	resp, err := s.client.Do(ctx, req, m)
  	if err != nil {
  		return nil, resp, err
  	}
  
  	return m, resp, nil
  }
docs: // CreateTeamDiscussionReaction creates a reaction for a team discussion.
  // The content should have one of the following values: "+1", "-1", "laugh", "confused", "heart", "hooray".
  //
  // GitHub API docs: https://developer.github.com/v3/reactions/#create-reaction-for-a-team-discussion