Imports github.com/go-co-op/gocron github.com/gorilla/handlers github.com/gorilla/mux github.com/sendgrid/sendgrid-go github.com/sendgrid/sendgrid-go/helpers/mail gorm.io/datatypes gorm.io/driver/mysql gorm.io/gorm Standard library imports crypto/md5 encoding/hex encoding/json fmt log math math/rand net/http os reflect strings time