Fixed a variable

app/routers/customer.py

@@ -0,0 +1,31 @@
+from fastapi import APIRouter
+from app.database import session
+import os
+
+from app.models.customer import Customer_Customer
+
+
+router = APIRouter(
+    prefix="/customer",
+    tags=["customer"],
+    responses={404: {"description": "Not found"}},
+)
+
+    
+@router.get("/{user_id}")
+async def get_customer(user_id):
+
+    get_the_customer =  (session.query(Customer_Customer)
+                            .filter(Customer_Customer.id == user_id)
+                            .first())
+
+
+    return {
+            "ok": True,
+            "customer_phone_number": get_the_customer.customer_phone_number,
+            "customer_first_name": get_the_customer.customer_first_name,
+            "customer_last_name": get_the_customer.customer_last_name,
+            "account_number": get_the_customer.account_number,
+        }
+  
+