Remove hardcoded NCBI credentials in fetch_refseq_sequence function

src/my_utils.py

@@ -521,8 +521,9 @@ def fetch_refseq_sequence(refseq_id: str) -> str | None:
     Returns the raw amino-acid sequence as a string, or None on failure.
     """
     # ——— NCBI credentials ———
-    Entrez.email   = "puglia.jd@gmail.com"
-    Entrez.api_key = "d768134734612d58be85117e1ff22e243807"
+    Entrez.email   = "" # Replace with your email
+
+    Entrez.api_key = "" # Replace with your NCBI API key if available
 
     # ——— 1) Try NCBI Entrez ———
     try: