code: func (c *ExampleService) FindUserByID(ctx context.Context, id platform.ID) (*platform.User, error) {
  	var u *platform.User
  
  	err := c.kv.View(func(tx Tx) error {
  		usr, err := c.findUserByID(ctx, tx, id)
  		if err != nil {
  			return err
  		}
  		u = usr
  		return nil
  	})
  
  	if err != nil {
  		return nil, &platform.Error{
  			Op:  "kv/" + platform.OpFindUserByID,
  			Err: err,
  		}
  	}
  
  	return u, nil
  }
docs: // FindUserByID retrieves a example by id.