hex to string

app.py

@@ -13,7 +13,7 @@ ocean = Ocean(config)
 def wallet(hello):
     account, mnemonic = get_wallet()
 
-    private_key = account.key
+    private_key = account.key.hex()
     address = account.address
 
     # wallet = Wallet(ocean.web3, private_key, transaction_timeout=20, block_confirmations=config.block_confirmations)