Imports github.com/gorilla/mux github.com/jmoiron/sqlx github.com/mailgun/mailgun-go/v4 github.com/mattn/go-sqlite3 github.com/sendgrid/sendgrid-go github.com/sendgrid/sendgrid-go/helpers/mail Standard library imports bytes compress/gzip context crypto/sha256 database/sql database/sql/driver encoding/base64 encoding/binary encoding/hex encoding/json errors fmt io/ioutil net/http strconv time