backend: admin flag on get

crates/backend/src/controller/user.rs

@@ -19,6 +19,7 @@ pub struct UserWithoutPassword {
     id: Uuid,
     name: String,
     email: String,
+    admin: bool,
 }
 
 #[derive(Deserialize)]
@@ -35,6 +36,7 @@ impl From<entity::user::Model> for UserWithoutPassword {
             id: value.id,
             name: value.name,
             email: value.email,
+            admin: value.admin,
         }
     }
 }