Show user by ID implemented

At /users/{id},
Also minor bugfixes and improvements

frontend/src/lib.rs

@@ -19,6 +19,8 @@ enum Route {
     Login,
     #[at("/users")]
     AllUsers,
+    #[at("/users/:id")]
+    UserByID { id: i16 },
     #[not_found]
     #[at("/404")]
     NotFound,
@@ -34,6 +36,7 @@ fn switch(route: Route) -> Html {
         Route::Register => html! { <user::Register/> },
         Route::Login => html! { <user::Login/> },
         Route::AllUsers => html! {<user::AllUsers/>},
+        Route::UserByID { id } => html! { <user::UserByID id={id}/> },
     }
 }