Update docs/pages/signer/authentication/server-wallets.mdx

Co-authored-by: avarobinson <45052879+avarobinson@users.noreply.github.com>

Author: caleighc

docs/pages/signer/authentication/server-wallets.mdx

@@ -22,7 +22,7 @@ Get your **API key** by creating a new app in your [Alchemy Dashboard](https://d
 
 Generate a secure access key for authentication. This key will never be sent to our servers - we'll derive a public key from it when interacting with Alchemy.
 
-Note: This access key is not the same as the [access keys](https://www.alchemy.com/docs/how-to-create-access-keys#generating-access-keys) generated in the Alchemy Dashboard. It’s specific to server wallet authentication.
+Note: This access key is not the same as the [access keys](https://www.alchemy.com/docs/how-to-create-access-keys#generating-access-keys) generated in the Alchemy Dashboard. It’s specific to server wallet authentication. You must generate and securely store this key yourself.
 
 <Warning>
 **Critical: Save your access key securely!**