Changed jwt expiration to use hours instead of seconds

.env.example

@@ -11,4 +11,4 @@ DB_DATABASE=""
 
 # JWT Authentication
 JWT_SECRET="abc123"
-JWT_EXPIRATION="3600"
+JWT_EXPIRATION="8766"

helper/token.go

@@ -3,6 +3,7 @@ package helper
 import (
 	"errors"
 	"os"
+	"strconv"
 	"time"
 
 	"github.com/golang-jwt/jwt/v5"
@@ -22,14 +23,14 @@ func GenerateToken(userId string) (string, error) {
 		return "", errors.New("JWT_EXPIRATION is not set")
 	}
 
-	expiration, err := time.ParseDuration(jwtExpiration + "s")
+	jwtExpirationInt, err := strconv.Atoi(jwtExpiration)
 	if err != nil {
-		return "", errors.New("invalid JWT_EXPIRATION value")
+		return "", err
 	}
 
 	claims := jwt.MapClaims{
 		"userId": userId,
-		"exp":    time.Now().Add(expiration).Unix(),
+		"exp":    time.Now().Add(time.Duration(jwtExpirationInt) * time.Hour).Unix(),
 	}
 
 	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)