access_key: API access key used to retrieve data from the Weatherstack API.(https://weatherstack.com/product)
query: A location to query such as city, IP, latitudeLongitude, or zipcode. Multiple locations with semicolon seperated if using a professional plan or higher. For more info- (https://weatherstack.com/documentation#query_parameter)
historical_date: This is required for enabling the Historical date API with format- (YYYY-MM-DD). * Note, only supported by paid accounts