如何从.net核心客户端生成JWT承载流OAuth访问令牌？

using System.IdentityModel.Tokens.Jwt;
using System.Security.Claims;
using Microsoft.IdentityModel.Tokens;

public string GenerateJwtToken(string clientId, string clientSecret, string audience, string issuer)
{
    var securityKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(clientSecret));
    var credentials = new SigningCredentials(securityKey, SecurityAlgorithms.HmacSha256);

    var claims = new[]
    {
        new Claim(JwtRegisteredClaimNames.Sub, clientId),
        new Claim(JwtRegisteredClaimNames.Jti, Guid.NewGuid().ToString())
    };

    var token = new JwtSecurityToken(
        issuer: issuer,
        audience: audience,
        claims: claims,
        expires: DateTime.UtcNow.AddMinutes(30),
        signingCredentials: credentials
    );

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

string jwtToken = GenerateJwtToken("yourClientId", "yourClientSecret", "yourAudience", "yourIssuer");