clarify credential rotation

Author: Simon Goldberg

lib/bitcoin-core/README.md

@@ -269,7 +269,7 @@ This will update the value of your credentials in Secrets Manager.
 
 **Replacing the Credentials and Restarting the Node to Apply Updates**
 
-- Replace the old `rpcauth` value from the `bitcoin.conf` file with the new one. Make sure that you change the placeholder value for `[new rpcauth string with escape char]`:
+- Replace the old `rpcauth` value from the `bitcoin.conf` file with the new one. Make sure that you change the placeholder value for `[new rpcauth string with escape char]` (this is printed to the terminal after running the `generateRPCAuth` script):
 
   ```
   sudo docker exec -it bitcoind sh -c "sed -i 's/^rpcauth=.*/rpcauth=[new rpcauth string with escape char]/' /root/.bitcoin/bitcoin.conf"

lib/bitcoin-core/generateRPCAuth.js

@@ -73,7 +73,7 @@ async function storeCredentialsInAWS(username, password) {
 async function genRpcAuthStr(username, password, salt) {
     const rpcauth = genRpcAuth(username, password, salt);
     const str = `rpcauth=${rpcauth.username}:${rpcauth.salt}$${rpcauth.hash}`;
-    const strEscapeCharacter = `rpcauth=${rpcauth.username}:${rpcauth.salt}\\$${rpcauth.hash}`;
+    const strEscapeCharacter = `${rpcauth.username}:${rpcauth.salt}\\$${rpcauth.hash}`;
     console.log(`Username: ${rpcauth.username}`);
     console.log("Password generated securely and stored in Secrets Manager");
     console.log(`rpcauth string with escape character: ${strEscapeCharacter}`);  // Print the rpcauth string