# Mapping

Before you can use the **Login with** your identity provider button, you need to map the identity provider data fields to your Shopware fields.

This is important for Shopware, because it has some required fields that are necessary for creating a customer and do a login. There are required fields like like e-mail, firstname, lastname and address data. Depending on teh identity provider and only some of those fields are available.

If you choose one of our drafts for you SSO login button entry, the mapping is already pre-defined.

For expert users: You can change the mapping and add additional fields by clicking the **Add** button.

<figure><img src="/files/TEOOZd0m198rQDbqs8qg" alt=""><figcaption></figcaption></figure>

{% hint style="info" %}
If you are not sure if there is a required value available use the **Default value** setting. In that case the value is filled by this default value as a fallback.

If a variable doesn't exist at identity provider site, you can also leave the **SSO Field** empty.
{% endhint %}


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