public Test(IHttpContextAccessor httpContextAccessor, IConfiguration configuration)
{
    _configuration = configuration;
    _fsql = new FreeSql.FreeSqlBuilder()
        .UseConnectionString(DataType.MySql, _configuration.GetConnectionString("DefaultConnection") + ";AllowPublicKeyRetrieval=True")
        .UseAdoConnectionPool(true)
        .UseMonitorCommand(cmd => Console.WriteLine($"Sql：{cmd.CommandText}"))
        .UseAutoSyncStructure(true) //自动同步实体结构到数据库，只有CRUD时才会生成表
        .Build();
    
    _httpContextAccessor = httpContextAccessor;
}

appsettings

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft.AspNetCore": "Warning"
    }
  },
  "AppSettings": {
    "InjectMiniProfiler": false
  },
  "AllowedHosts": "*",
  "DetailedErrors": true,
  "ConnectionStrings": {
    "DefaultConnection": "Data Source=localhost;Port=3306;User ID=root;Password=Zz123456; Initial Catalog=ABCLab;Charset=utf8mb4; SslMode=none;Min pool size=1",
    "RemoteConnection": "Data Source=38.147.184.00;Port=3306;User ID=Cartoon;Password=Zz123456; Initial Catalog=Cartoon;Charset=utf8mb4; SslMode=none;Min pool size=1"
  }
}