Hello Imadouino,
For the UI edit on settings.js to set an user & passw for HTTPS , I think this is what you wanted.
Uncomment and edit as follows:
// To password protect the node-defined HTTP endpoints (httpNodeRoot), or
// the static content (httpStatic), the following properties can be used.
// The pass field is a bcrypt hash of the password.
// See http://nodered.org/docs/security.html#generating-the-password-hash
httpNodeAuth: {user:"xxxx",pass:"xxxx"
httpStaticAuth: {user:"xxx",pass:"xxxxx`
Regards
