goal

type IHandler interface {
	// GetByID serve caller to get a goal by id
	GetByID(c *gin.Context)

	// Create a goal
	Create(c *gin.Context)

	// List serve caller to list all goals
	List(c *gin.Context)

	// ChangeTitle serve caller to change goal's title
	ChangeTitle(c *gin.Context)

	// ChangeTimeRange serve caller to change goal's start and end
	ChangeTimeRange(c *gin.Context)

	// Delete a goal by id
	Delete(c *gin.Context)
}