Clarify the error message for an invalid api key slightly
Clarify the error message for an invalid api key slightly

the-darkvoid/spotweb,riksmith/Spotweb,GeoffreyDijkstra/spotweb,mbirth/spotweb,LeeThompson/spotweb,tswestendorp/spotweb,gijsroge/spotweb,rodikal/Spotweb,rodikal/Spotweb,Blauwbek/spotweb,gijsroge/spotweb,isuftin/spotweb-1,tswestendorp/spotweb,mesa57/spotweb,riksmith/Spotweb,Spotweb/Spotweb,Blauwbek/spotweb,LeeThompson/spotweb,mbirth/spotweb,Spotweb/Spotweb,Blauwbek/spotweb,mesa57/spotweb,isuftin/spotweb-1,GeoffreyDijkstra/spotweb,the-darkvoid/spotweb