ref: Change User interface to be more generic (#1672)

Author: kamilogorek

packages/types/src/index.ts

@@ -83,11 +83,11 @@ export interface Breadcrumb {
 
 /** JSDoc */
 export interface User {
+  [key: string]: any;
   id?: string;
   ip_address?: string;
   email?: string;
   username?: string;
-  extra?: { [key: string]: any };
 }
 
 /** JSDoc */