small refactors

app.py

@@ -175,7 +175,7 @@ class SpaceBuilder:
             url = f"https://huggingface.co/spaces/{repo_name}"
             response = requests.get(url)
             if response.status_code == 200:
-                cls.error_message = f"The {repo_name} is already used for the given token's user"
+                cls.error_message = f"The {repo_name} is already used."
                 return False
             else:
                 print(f"The space name {repo_name} is available")