如何在项目中刷新jwtsecuritytoken？

Question

我创建了一个.net核心api，它将向客户端发送jwtsecuritytoken。连接的用户要使用该应用程序的功能，每个功能都必须具有一个令牌，例如，该令牌的有效期为5分钟，并且该令牌在到期后必须刷新（如果没有错误）。

我开始编写一些东西，但是我不知道如何刷新令牌？

[Route("api/[controller]")]
[ApiController]
public class TokenController : ControllerBase
{

    private string GenerateToken(string username)
    {
        SymmetricSecurityKey key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes("ijustwanttotestsomething"));

        Claim[] claims = new Claim[]
        {
            new Claim(ClaimTypes.Name , username)
        };

        JwtSecurityToken jwt = new JwtSecurityToken(
            claims: claims,
            notBefore: DateTime.UtcNow,
            expires: DateTime.UtcNow.AddMinutes(5),
            signingCredentials: new SigningCredentials(key, SecurityAlgorithms.HmacSha256)
        );

        return new JwtSecurityTokenHandler().WriteToken(jwt);
    }

    [HttpPost]
    public ActionResult<string> Create(string username)
    {
        return GenerateToken(username);
    }

    [HttpGet]
    public ActionResult<JwtSecurityToken> TokenExpired (string token)
    {
        var stream = token ;
        var handler = new JwtSecurityTokenHandler();
        var jsonToken = handler.ReadToken(stream);
        JwtSecurityToken tokenS = handler.ReadToken(stream) as JwtSecurityToken;

        DateTime dateTimeToken = DateTime.UtcNow;

        if (dateTimeToken > tokenS.ValidTo)
            return BadRequest("EXPIRED");

        return Ok(tokenS);
    }

    [HttpGet("[Action]")]
    public ActionResult<JwtSecurityToken> RefreshToken (string token)
    {
        // CODE SOMETHING
    }
}