Fix warnings, and general code cleanup

src/database/models.rs

@@ -2,7 +2,7 @@ use crate::database::schema::{favorites, users};
 use serde::Serialize;
 
 #[derive(Insertable)]
-#[table_name = "users"]
+#[diesel(table_name = users)]
 pub struct InsertUser<'a> {
     pub username: &'a str,
     pub password: &'a str,
@@ -17,7 +17,7 @@ pub struct User {
 }
 
 #[derive(Insertable)]
-#[table_name = "favorites"]
+#[diesel(table_name = favorites)]
 pub struct InsertFavorite<'a> {
     pub userid: &'a i32,
     pub path: &'a str,