refactor: handle a few errors without panic!

src/main.rs

@@ -34,7 +34,7 @@ pub struct User {
 struct Webchain(sqlx::SqlitePool);
 
 #[get("/links")]
-async fn links_template(mut db: Connection<Webchain>, cookies: &CookieJar<'_>) -> Template {
+async fn links_template(mut db: Connection<Webchain>, cookies: &CookieJar<'_>) -> Result<Template, &'static str> {
     if let Some(cookie) = cookies.get("session") {
         let username = cookie.value();
 
@@ -50,21 +50,13 @@ async fn links_template(mut db: Connection<Webchain>, cookies: &CookieJar<'_>) -
         .await
         .context("Failed to to retrieve stored credential");
     
-        let username: String = match row {
-            Ok(Some(row)) => row.get("username"),
-            Ok(None) => {
-                panic!("Username not found");
-            }
-            Err(_) => {
-                panic!("Could not get the username from the database");
-            }
-        };
+        let username: String = row.unwrap().expect("Couldn't retrieve the row").get("username");
 
-        Template::render("links", context! { 
+        Ok(Template::render("links", context! { 
             username: username,
-        })
+        }))
     } else {
-        panic!("Please log in first!");
+        Err("Please log in first!")
     }
 }