From Solution Explorer, navigate to the /ClientApp/app/components/login/ folder and open the login.component.ts file; replace the current content with this brand-new login form:
<div class="login-container"> <img id="login-img" class="login-img" src="//ssl.gstatic.com/accounts/ui/avatar_2x.png" /> <h2 class="login-title">{{title}}</h2> <form [formGroup]="form" (ngSubmit)="onSubmit()" class="login-form"> <div *ngIf="form.errors?.auth" class="error-panel help-block"> {{form.errors.auth}} </div> <div class="form-group" [ngClass]="{ 'has-error has-feedback' : hasError('Username') }"> <input type="text" required formControlName="Username" class="form-control" placeholder="Username or Email address" /> <span *ngIf="hasError('Username')" ...