You do not need a username and password all the time. The ones i buy doesn't need them. I basically log into my account on the proxy service website i bought from and just enter the ip and port in osbot and it works. Also, if you found a big list with proxies, this means they are public and most probably flagged so it will be a risk botting on them. Finally, they also need to be Socks 4/5 proxies. Hope i helped you and welcome to OSBOT!