Pushing traces to a otlp endpoint.

[Odinaka-git]

	//Create instance to store options to initialize custome trace with.
	opentelemetry::exporter::otlp::OtlpHttpExporterOptions opts;

	//provide the "OTEL_EXPORTER_OTLP_ENDPOINT" here.
	opts.url = "";

	//provide the "OTEL_EXPORTER_OTLP_HEADERS" here.
	opts.http_headers = opentelemetry::v1::exporter::otlp::OtlpHeaders();

I'm trying to send traces to a grafana cloud, so I'm currently writing a c++ application to achieve this. To do this I need to set the "OTEL_EXPORTER_OTLP_ENDPOINT" and "OTEL_EXPORTER_OTLP_HEADERS". The endpoint is easy, cause all I have to do is pass a string to it, but I'm having issues setting up the OTLP_HEADERS. I'm going through examples in the opentelemetry git repository but I haven't been able to find anything yet. I'm hoping someone here has run into this road block before.