fix in smtp and split rs files

src/auth/mod.rs

@@ -20,7 +20,7 @@ use lettre::{
 use rand_core::{OsRng, RngCore};
 use serde::{Deserialize, Serialize};
 use sha2::{Digest, Sha256};
-use sqlx::{any::AnyRow, Row};
+use sqlx::{Row, any::AnyRow};
 use tracing::{debug, info, warn};
 
 use crate::{
@@ -2113,7 +2113,7 @@ async fn send_message(smtp: &SmtpConfig, message: Message, label: &str) -> Resul
     }
     .port(smtp.port);
 
-    if !smtp.username.is_empty() {
+    if !smtp.username.trim().is_empty() && !smtp.password.is_empty() {
         builder = builder.credentials(Credentials::new(
             smtp.username.clone(),
             smtp.password.clone(),