fix email as 2fa for sso (#6495)

* fix email as 2fa for sso

* allow saving device without updating `updated_at`

* check if email is some

* allow device to be saved in postgresql

* use twofactor_incomplete table

* no need to update device.updated_at

src/db/models/user.rs

@@ -1,4 +1,4 @@
-use crate::db::schema::{invitations, sso_users, users};
+use crate::db::schema::{invitations, sso_users, twofactor_incomplete, users};
 use chrono::{NaiveDateTime, TimeDelta, Utc};
 use derive_more::{AsRef, Deref, Display, From};
 use diesel::prelude::*;
@@ -10,7 +10,7 @@ use super::{
 use crate::{
     api::EmptyResult,
     crypto,
-    db::DbConn,
+    db::{models::DeviceId, DbConn},
     error::MapResult,
     sso::OIDCIdentifier,
     util::{format_date, get_uuid, retry},
@@ -386,6 +386,20 @@ impl User {
         }}
     }
 
+    pub async fn find_by_device_for_email2fa(device_uuid: &DeviceId, conn: &DbConn) -> Option<Self> {
+        if let Some(user_uuid) = db_run! ( conn: {
+            twofactor_incomplete::table
+                .filter(twofactor_incomplete::device_uuid.eq(device_uuid))
+                .order_by(twofactor_incomplete::login_time.desc())
+                .select(twofactor_incomplete::user_uuid)
+                .first::<UserId>(conn)
+                .ok()
+        }) {
+            return Self::find_by_uuid(&user_uuid, conn).await;
+        }
+        None
+    }
+
     pub async fn get_all(conn: &DbConn) -> Vec<(Self, Option<SsoUser>)> {
         db_run! { conn: {
             users::table