Load environment variables from a .env file in Go using godotenv

main.go

package main

import (
    "log"
    "github.com/joho/godotenv"
    "fmt"
    "os"
)

// init is invoked before main()
func init() {
    // loads values from .env into the system
    if err := godotenv.Load(); err != nil {
        log.Print("No .env file found")
    }
}

func main() {
    // Get the GITHUB_USERNAME environment variable
    githubUsername, exists := os.LookupEnv("GITHUB_USERNAME")

    if exists {
	fmt.Println(githubUsername)
    }

    // Get the GITHUB_API_KEY environment variable
    githubAPIKey, exists := os.LookupEnv("GITHUB_API_KEY")
	
    if exists {
	 fmt.Println(githubAPIKey)
    }
}