<form method="POST" action="index.php?op=usuario/registro" id="formUsuario" >

                    <div class="form-group">
                        <label for="txtEmailUsuario">Email:</label>
                        <input type="text" id="txtEmailUsuario" name="txtEmailUsuario" value="" class="form-control mx-sm-3">
                        {if $userModel-> $errors['email'] }
                            <div class="invalid-feedback">
                                <ul>
                                    {foreach from=$userModel-> $errors['email'] item=error}
                                        <li>{$error}</li>
                                        {/foreach}
                                </ul>
                            </div>
                        {/if}

                    </div>

                    <div class="form-group">
                        <label for="inputPassword">Password</label>
                        <input type="password" id="txtPassword" name="txtPassword" class="form-control mx-sm-3" >
                        {if $userModel->$errors['password']}
                            <div class="invalid-feedback">
                                <ul>
                                    {foreach from=$userModel-> $errors['password'] item=error}
                                        <li>{$error}</li>
                                        {/foreach}
                                </ul>
                            </div>
                        {/if}
                        <small class="text-muted">
                            <input type="checkbox" onclick="" class="form-check-input"> Mostrar Contraseña
                        </small>
                    </div>

                    <div class="custom-control custom-checkbox my-1 mr-sm-2">
                        <input type="checkbox" class="custom-control-input" id="customControlInline"  name="chkAdmin" value="1" />
                        <label class="custom-control-label" for="customControlInline">Administrador</label>
                    </div>
                    <input type="submit" value="Guardar" id="btnGrabarUsuario" class="btn-primary btn-lg">
                    <input type="reset" value="Cancelar" id="btnCancelarUsuario" class="btn-primary btn-lg">
                </form>