Can delete user account

src/data/entity_manager.rs

@@ -92,7 +92,7 @@ impl<E> EntityManager<E>
         self.list.clone()
     }
 
-    pub fn update_or_replace(&mut self, entry: E) -> Res {
+    pub fn update_or_push(&mut self, entry: E) -> Res {
         let mut found = false;
         for i in &mut self.list {
             if i == &entry {
@@ -108,4 +108,9 @@ impl<E> EntityManager<E>
 
         self.save()
     }
+
+    pub fn remove(&mut self, entry: &E) -> Res {
+        self.list.retain(|x| x != entry);
+        self.save()
+    }
 }