.fn_set_ratelimit: Set rate limit
Description
A helper function that creates a new copy of the httr::GET function and stores it
in the .ffscrapr_env hidden object
Usage
.fn_set_ratelimit(toggle = TRUE, platform, rate_number, rate_seconds)
Arguments
toggle
a logical to turn on rate_limiting if TRUE and off if FALSE
rate_number
number of calls per rate_seconds