title: Typescript - Parameter 'u' implicitly has an 'any' type
body: <p>I converted this code to the latest Angular 2.  <a href="https://github.com/leonardohjines/angular2-login/blob/master/app/authentication.service.ts" rel="noreferrer">authentication.service.ts</a></p>
  
  <p>What should the code look like?</p>
  
  <pre><code>app/auth/auth.service.ts(30,40): error TS7006: Parameter 'u' implicitly has an 'any' type.
  
  // services/auth.service.ts
  import {Injectable} from '@angular/core';
  import {Router} from '@angular/router';
  
  //http://4dev.tech/2016/03/login-screen-and-authentication-with-angular2/
  //https://github.com/leonardohjines/angular2-login
  export class User {
    constructor(
      public email: string,
      public password: string) { }
  }
  
  var users:any = [
    new User('admin@admin.com','adm9'),
    new User('user1@gmail.com','a23')
  ];
  
  @Injectable()
  export class AuthenticationService {
  
    constructor(
      private _router: Router){}
  
    logout() {
      localStorage.removeItem("user");
      this._router.navigate(['Login']);
    }
  
    login(user:any){
      var authenticatedUser = users.find(u =&gt; u.email === user.email);
      if (authenticatedUser){
        localStorage.setItem("user", authenticatedUser);
        this._router.navigate(['Home']);      
        return true;
      }
      return false;
  
    }
  
     checkCredentials( ){
      if (localStorage.getItem("user") === null){
          this._router.navigate(['Login']);
      }
    } 
  }
  </code></pre>