drop user if exists 'av_trng1'@'192.170.1.19';
drop user if exists 'av_trng1'@'192.170.1.20';
drop user if exists 'av_trng1'@'192.170.1.21';
drop user if exists 'av_trng1'@'192.170.1.22';
drop user if exists 'av_trng1'@'35.211.173.53';
drop user if exists 'av_trng1'@'localhost';
drop database if exists av_trng1;