create-user.component.html

<h1>Create User</h1>
<form [formGroup]="createUser" (ngSubmit)="onSubmit()">
    <input type="text" placeholder="Username" formControlName="username">
    <br>
    <input type="password" placeholder="Password" formControlName="password">
    <br>
    <label>Admin</label><input type="checkbox" formControlName="admin">
    <br>
    <button type="submit">Create</button><button (click)="closeModal.emit()">Close</button>
</form>