Update app.py

app.py

@@ -6,7 +6,7 @@ import os
 from sentence_transformers import SentenceTransformer
 
 model = SentenceTransformer(
-        "dunzhang/stella_en_400M_v5",
+        "dunzhang/stella_en_1.5B_v5",
         trust_remote_code=True,
         device="cpu",
         config_kwargs={"use_memory_efficient_attention": False, "unpad_inputs": False}
@@ -45,7 +45,7 @@ def parse(data):
 async def get_embedding(embedding: Embedding, req: Request):
     
     token = req.headers.get("Authorization")
-    if os.environ.get('token') != token[7:]:
+    if not token or os.environ.get('token') != token[7:]:
         raise HTTPException(status_code=401, detail="Unauthorized.")
     
     if model == None: