Imports github.com/jackc/pgx/v4 github.com/jackc/pgx/v4/pgxpool github.com/skip2/go-qrcode github.com/valyala/fasthttp github.com/vincent-petithory/dataurl Standard library imports context crypto/sha256 encoding/base32 encoding/base64 errors fmt image/color image/gif image/png log net/url os regexp strconv strings