can.go

can.go

//this way?
func CanSubscribe(userID int, courseID int) bool {
     
}

//this way?
func CanSubscribe(userID int, courseID int) error {
  //if can't subscribe return an error
  //if can return nil
  //if there's an error, like a database connection error, return the error itself    
}

//or this way?
func CanSubscribe(userID int, courseID int) (bool, error) {
  //if can't subscribe return an false and an error
  //if can return true and nil
  //if there's an error return false and an error
}