func CheckLicense() bool{
    env, err := dotenv.ReadFile("/home/project/license.env")
    key := env["key"]
    email := env["email"]
    username := env["username"]
    mySigningKey := []byte(key)
    claims := LicenseClaims{
        email,
        jwt.StandardClaims{
            ExpiresAt: 15000,
            Issuer:    username,
        },
    }
    token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
    ss, err := token.SignedString(mySigningKey)
    jsonData := jsonDataType{
        Token: ss,}
    res, err := httpclient.PostJson("http://mylicenseserver", jsonData)
    decoder := json.NewDecoder(res.Body)
    var data jsonDataType
    err = decoder.Decode(&data)
    respclaims := LicenseClaims{}
    token, err = jwt.ParseWithClaims(data.Token, &respclaims, func(token *jwt.Token) (interface{}, error) {
        return []byte(key), nil
    })
if (respclaims.Email == email) && (respclaims.Issuer == username) {return true} else {return false}
}