add decrypt

src/envs.py

@@ -29,4 +29,10 @@ API = HfApi(token=TOKEN)
 
 with open('pubkey.pem', 'rb') as f:
     pub = f.read()
-    RSA_PUBKEY = rsa.PublicKey.load_pkcs1(pub)
+    RSA_PUBKEY = rsa.PublicKey.load_pkcs1(pub)
+
+def decrypt_email(email_encrypted: str) -> str:
+    with open('privkey.pem', mode='rb') as f:
+        prikey = rsa.PrivateKey.load_pkcs1(f.read())
+    
+    return rsa.decrypt(bytes.fromhex(email_encrypted), prikey).decode()