Problem with ElasticSearch username and password using serilog

[Mahdieh_Hosseini]

I'm using the serilog in my ASP.NET Core app to log data to Elasticsearch. My code was working fine when the xpack.security was disabled. I enabled the security and defined passwords for default users (elastic, apm_system, kibana, logstash_system, beats_system, remote_monitoring_user). I logged into elastic and kibana without any problem. But when I run my application, it doesn't log data in elasticsearch.

Serilog configuration is like this:

private Action<AbpBootstrapperOptions> ConfigSerilog()
{
    var configuration = new ConfigurationBuilder()
        .AddJsonFile($"serilog.json")
        .Build();
    var config = new LoggerConfiguration()
        .ReadFrom.Configuration(configuration)
        .CreateLogger();
    return options => options.IocManager.IocContainer.AddFacility<LoggingFacility>(f => f.LogUsing(new SerilogFactory(config)));
}

and my serilog.json file is like this:

"WriteTo": [
          { "Name": "Console" },
          {
            "Name": "Elasticsearch",
            "Args": {
              "nodeUris": "http://serilog:mypasswordhere@localhost:9200",
              "indexFormat": "logstash-{0:yyyy.MM.dd}",
              //some other configs
            }
        ]

I guess the problem is with "serilog" user, and I have to define a new user. But I'm not sure about it and I don't know what roles to assign to this new user.

I also tried to get a list of current users and their roles, but it had no result:

elasticsearch-users list No users found

I think it just shows user-defined users, but not sure about it either.