How do I open and pool connections using GORM?

package main

import (
    "gorm.io/driver/mysql"
    "gorm.io/gorm"
    "log"
)

func main() {
    // Define the connection string
    dsn := "user:password@tcp(127.0.0.1:3306)/dbname?charset=utf8mb4&parseTime=True&loc=Local"

    // Open a new database connection
    db, err := gorm.Open(mysql.Open(dsn), &gorm.Config{})
    if err != nil {
        log.Fatal("failed to connect database: ", err)
    }

    // Configure connection pooling
    sqlDB, err := db.DB()
    if err != nil {
        log.Fatal("failed to get generic database: ", err)
    }

    // Set the maximum number of connections in the idle connection pool
    sqlDB.SetMaxIdleConns(10)

    // Set the maximum number of open connections to the database
    sqlDB.SetMaxOpenConns(100)

    // Set the maximum lifetime of a connection
    sqlDB.SetConnMaxLifetime(60 * time.Minute)

    // Continue with your application logic...
}