added backend service for generating username

Signed-off-by: L.M. Bibera <lyndon.bibera@orangeandbronze.com>
integrated username generation service in the upload system

Signed-off-by: L.M. Bibera <lyndon.bibera@orangeandbronze.com>
integrated password generation service in the upload system

Signed-off-by: L.M. Bibera <lyndon.bibera@orangeandbronze.com>