Need change TimeOut

[maxbagrov2]

I need to extend KeycloakOptions with a TimeOut option and use here:

	private IFlurlRequest GetBaseUrl(string authenticationRealm) =>
		new Url(_url).AppendPathSegment(_options.Prefix)
					 .WithSettings(settings => settings.JsonSerializer = _serializer)
					 .WithAuthentication(_getToken,
										 _url,
										 _options.AuthenticationRealm ?? authenticationRealm,
										 _userName,
										 _password,
										 _clientSecret,
										 _options)
					 .WithTimeout(_options.TimeOut );