Control Easily Who Can Perform Authenticated Callouts
Configuring permissions for named credentials so that your users can make authenticated callouts to external systems has gotten much easier. Previously, after you enabled external credential principal access, you also assigned object permissions for User External Credentials manually on each permission set or profile. Now, most standard permission sets and profiles have access to the User External Credentials object by default. For the guest user profile, and for existing custom permission sets and profiles, you must still grant access to the User External Credentials object manually
