Update app.py

app.py

@@ -12,7 +12,7 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.'''
 
-
+import os
 import requests
 import json
 import pandas as pd
@@ -43,7 +43,7 @@ login(hf_token)
 
 
 API_URL = "https://api-inference.huggingface.co/models/google/tapas-base-finetuned-wtq"
-headers = {"Authorization": f"Bearer {HF_TOKEN}"}
+headers = {"Authorization": f"Bearer {hf_token}"}
 
 def query(payload):
     response = requests.post(API_URL, headers=headers, json=payload)