Imports github.com/aws/aws-sdk-go-v2/config github.com/aws/aws-sdk-go-v2/service/s3 github.com/google/uuid golang.org/x/crypto/bcrypt golang.org/x/oauth2 golang.org/x/oauth2/google google.golang.org/api/gmail/v1 google.golang.org/api/option Standard library imports context crypto/rand encoding/base64 encoding/json fmt io log mime/multipart net/http os os/user path/filepath strconv strings time