fix: improve security by deprecating creating users with public access by default (#7319)

src/Options/index.js

@@ -246,6 +246,9 @@ export interface ParseServerOptions {
   /* The security options to identify and report weak security settings.
   :DEFAULT: {} */
   security: ?SecurityOptions;
+  /* Set to true if new users should be created without public read and write access.
+  :DEFAULT: false */
+  enforcePrivateUsers: ?boolean;
 }
 
 export interface SecurityOptions {