I am new on Grafana and I've tried to add Osisoft-PI as datasource on it. I setted the configuration settings by looking at the articles (It says setting proxy access setting and basic authentication) but I couldn't find how to adjust proxy settings and configure API Key (I created an API Key but I don't know where to use the key). So I've just add server acces, but it gives errors like "HTTP Error Bad Gateway" or "HTTP Error Unauthorized". Could you help me about it? Thank you in advise.