feat: add rank

models/currency.py

@@ -6,6 +6,7 @@ from typing import Optional
 class DiscordCurrency:
     id: Optional[int]
     user_id: int
+    user_name: str
     balance: int
     updated_at: datetime
 
@@ -21,4 +22,4 @@ class DiscordCurrency:
             "user_id": self.user_id,
             "balance": self.balance,
             "updated_at": self.updated_at
-        }
+        }