Clarify disable password side effects (#2029)

Author: alexisintech

docs/authentication/configuration/sign-up-sign-in-options.mdx

@@ -56,7 +56,7 @@ The **passwordless** strategy provides a more secure and convenient sign-in meth
 To configure authentication strategies:
 
 1. In the Clerk Dashboard, navigate to the [**Email, phone, username**](https://dashboard.clerk.com/last-active?path=user-authentication/email-phone-username) page.
-1. In the **Authentication strategies** section, toggle on the authentication strategies you would like to enable.
+1. In the **Authentication strategies** section, toggle on the authentication strategies you would like to enable. Note that disabling **Password** will only affect new users. Existing users will still be able to sign in with their existing password.
 
 ### Passkeys