# Biometric auth

![](/files/Xzzric23Ii0d1ug4Fziy)

{% tabs %}
{% tab title="Entry Vars" %}
**title :** You must enter the title that will be displayed when requesting permissions from the user.

**subtitle :** You must enter the subtitle that will be displayed when requesting permissions from the user.

**description :**  You must enter the description of the use of the function that will be shown when requesting permissions from the user.

**negativeButtonText :** You must enter the description of the use of the function that will be shown when requesting permissions from the user.

**Step by Step :**

<figure><img src="/files/WGpX1MzjSW57rT70wXAU" alt=""><figcaption></figcaption></figure>
{% endtab %}

{% tab title="Callbacks & Outvar" %}
**onError :** Runs when access to biometric verification is not allowed or canceled.

OutVars&#x20;

`Null`

**onUnsuccessfulAuth :** It is executed when the biometric data of the user is incorrect to that stored in the device.

OutVars&#x20;

`Null`

**onSuccess :** It is executed when the user's biometric data is correct to that stored in the device.

OutVars&#x20;

`Null`
{% endtab %}

{% tab title="Features" %}

{% endtab %}

{% tab title="examples" %}

{% endtab %}
{% endtabs %}


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