Function to get a window of prices. Based the users input.
Function to get percentage of renewables used in the grid for a given state and a given window.
Function to get the Site data
Function to retrieve historical price data based on a date range supplied by the user.
Function to get and return only the users Site ID.
Function to validate the user has supplied the date in the correct format and that
the date is a valid calender date.
Will exit the application of the date format is wrong or invalid.
CVS writer for historical data