feat: enhanced typing for CurrentUserChecker by introducing generics (#1375)

Author: angelxmoreno

src/CurrentUserChecker.ts

@@ -3,4 +3,4 @@ import { Action } from './Action';
 /**
  * Special function used to get currently authorized user.
  */
-export type CurrentUserChecker = (action: Action) => Promise<any> | any;
+export type CurrentUserChecker = <User = any>(action: Action) => Promise<User | null> | User | null;

src/index.ts

@@ -89,6 +89,8 @@ export * from './CustomParameterDecorator';
 export * from './RoleChecker';
 export * from './Action';
 export * from './InterceptorInterface';
+export * from './CurrentUserChecker';
+export * from './AuthorizationChecker';
 
 export * from './driver/BaseDriver';
 export * from './driver/express/ExpressDriver';