FOLLOW THESE STEPS-

Get SQLi dumper, and HQ DORKS.
Put the dorks in the SQLi Dumper and run it until you gather 5k~10k.
Start the scanner, website that are exploitable will be shown, when it ends start the exploiter.
The website that will appear next will be 'dumpable' which mean you can get their database.
Right click and select Go to dumper, then search the database for the column Email and the column Password.
Dump them.