feat: add warn

src/botv2/cmd/concour/period.rs

@@ -119,16 +119,22 @@ pub async fn period(
                     .color(colour::Color::RED)
             } else {
                 let concour = concour.unwrap();
-                CreateEmbed::new()
+                let mut output = CreateEmbed::new()
                     .title(concour.title)
                     .description(concour.description)
                     .field("Start date", concour.start_date.to_string(), false)
-                    .field("Periode", concour.periode.to_string(), false)
-                    .field(
+                    .field("Periode", concour.periode.to_string(), false);
+
+                if concour.role_recompense == 0 {
+                    output = output.field("Role récompense", "Aucun", false);
+                } else {
+                    output = output.field(
                         "Role récompense",
                         RoleId::new(concour.role_recompense).mention().to_string(),
                         false,
-                    )
+                    );
+                }
+                output
             }
         }
         Err(err) => match err {