build_nhtsa_url         Build a NHTSA URL
check_vin               Verify VIN Validity
check_vin_no_purrr      Verify VIN Validity Without Purrr
check_vin_purrr         Verify VIN Validity Using Purrr
decode_vin              Use the NHTSA API to Decode VINs
swap_letter             Replace a Letter in a Character Vector
swap_map                Replace Multiple Letters in a Character Vector
valid_check_digit       Check for Valid VIN Check Digit
valid_vin_format        Check VIN Length and Characters
