package main
   
    import (
        "github.com/Alice088/genv"
    )
   
    func main() {
        err := genv.Init("./env")
        if err != nil {
          ...
        }
   
        id, err := genv.Get("ID")
        if err != nil {
            ...
        }
       
        ...
    }

  package main

  import (
      "fmt"
      "github.com/Alice088/genv"
  )

  func main() {
      id, err := genv.MuGet[int]("ID") // ID="..." (string)
      if err != nil {
          panic(err)
      }

      fmt.Printf("ID: %T", id) //ID: int
  }