Merge pull request 'rename role to manage_events' (#556) from reanme-to-event into main

Reviewed-on: #556

src/model/user.rs

@@ -1190,7 +1190,7 @@ impl<'r> FromRequest<'r> for EventUser {
         let db = req.rocket().state::<SqlitePool>().unwrap();
         match User::from_request(req).await {
             Outcome::Success(user) => {
-                if user.has_role(db, "planned_event").await {
+                if user.has_role(db, "manage_events").await {
                     Outcome::Success(EventUser(user))
                 } else {
                     Outcome::Error((Status::Forbidden, LoginError::NotACox))