.NET\06_01_MicroServices_PMS\Users.APP\AppSettings.cs

                
                    using Microsoft.IdentityModel.Tokens;
using System.Text;

namespace Users.APP
{
    /// <summary>
    /// Represents application-level security settings used for JWT generation and validation.
    /// </summary>
    public class AppSettings
    {
        /// <summary>
        /// The token issuer — identifies the principal that issued the token.
        /// </summary>
        public static string Issuer { get; set; }

        /// <summary>
        /// The intended recipient of the token — usually the application itself.
        /// </summary>
        public static string Audience { get; set; }

        /// <summary>
        /// Token expiration time in minutes.
        /// </summary>
        public static int ExpirationInMinutes { get; set; }

        /// <summary>
        /// The secret key used to sign the JWT tokens.
        /// </summary>
        public static string SecurityKey { get; set; }

        /// <summary>
        /// Gets a symmetric security key derived from the <see cref="SecurityKey"/> property.
        /// Used to sign and validate JWT tokens.
        /// </summary>
        public static SecurityKey SigningKey => new SymmetricSecurityKey(Encoding.UTF8.GetBytes(SecurityKey));

        /// <summary>
        /// Gets or sets the number of days after which a refresh token expires.
        /// This value is used to determine token validity duration during authentication flows.
        /// </summary>
        /// <value>
        /// An integer representing the number of days until the refresh token is considered expired.
        /// </value>
        public static int RefreshTokenExpirationInDays { get; set; }
    }
}