如何向索赔中添加价值并从web api - .Net核心中检索它

public string CreateJwtToken(string userId, string secretKey)
{
    var claims = new[]
    {
        new Claim(ClaimTypes.NameIdentifier, userId)
        // 可以添加更多自定义声明
    };

    var key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(secretKey));
    var creds = new SigningCredentials(key, SecurityAlgorithms.HmacSha256);

    var token = new JwtSecurityToken(
        issuer: "yourIssuer",
        audience: "yourAudience",
        claims: claims,
        expires: DateTime.Now.AddMinutes(30),
        signingCredentials: creds);

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

public void ConfigureServices(IServiceCollection services)
{
    services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
        .AddJwtBearer(options =>
        {
            options.TokenValidationParameters = new TokenValidationParameters
            {
                ValidateIssuer = true,
                ValidIssuer = "yourIssuer",
                ValidateAudience = true,
                ValidAudience = "yourAudience",
                ValidateIssuerSigningKey = true,
                IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes("yourSecretKey")),
                RequireExpirationTime = true,
                ValidateLifetime = true
            };
        });

    services.AddControllers();
}

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    if (env.IsDevelopment())
    {
        app.UseDeveloperExceptionPage();
    }

    app.UseRouting();

    app.UseAuthentication();
    app.UseAuthorization();

    app.UseEndpoints(endpoints =>
    {
        endpoints.MapControllers();
    });
}

[ApiController]
[Route("api/[controller]")]
public class ClaimsController : ControllerBase
{
    [HttpGet]
    public IActionResult GetClaims()
    {
        var userId = User.FindFirst(ClaimTypes.NameIdentifier)?.Value;
        return Ok(new { UserId = userId });
    }
}