public async Task <IEnumerable <string> > ObterContatosUsuarioParaRedefinirSenha(string username) { string email = await _usuarioRepository.ObterEmailUsuarioPorUsername(username); if (string.IsNullOrEmpty(email)) { return(null); } string emailMascara = UsuarioHelper.AplicarMascaraEmail(email); return(new List <string> { emailMascara }); }