code: func (s *AuthorizationsService) Create(ctx context.Context, auth *AuthorizationRequest) (*Authorization, *Response, error) {
  	u := "authorizations"
  
  	req, err := s.client.NewRequest("POST", u, auth)
  	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: // Create a new authorization for the specified OAuth application.
  //
  // GitHub API docs: https://developer.github.com/v3/oauth_authorizations/#create-a-new-authorization