This question has been asked for QGIS 2 and it was poorly answered.
I have my API key from Thunderforest for accessing the OSM maps. I am trying to use the 'OSM TF outdoors' map. It requires an API key. But I have no idea where to put the url that contains my API key. The options that existed in QGIS 2 are either not there, or the answers are too vague to properly lead me to where I need to be.
I obtained the Thunderforest map through QuickMapServices
Does anyone know where to place OSM TF API keys in QGIS 3?