feat: Add endpoint country

app/api/endpoints/country.py

@@ -0,0 +1,9 @@
+from fastapi import APIRouter
+
+router = APIRouter()
+
+@router.post("/login")
+something like this I guess;
+another edited response
+async def login(username: str, password: str):
+    return {"message": "User logged in successfully", "username": username}