# Initialize

As a starting point, we need to obtain an JWT Authentication Bearer Token to authenticate further **user requests** to the Biometrid On API. To do so, we need to make a POST request to the **User login** method.

| Field    | Type   | Description   |
| -------- | ------ | ------------- |
| Email    | String | User email    |
| Password | String | User password |

At the end of this **initialize** process it will be returned a JSON Web Token (JWT) that will identify who's making the request. If an error occurs, it's necessary to repeat this process until a successful response of the service.

{% content-ref url="users/login" %}
[login](https://biometrid.gitbook.io/biometrid-api/api-user/users/login)
{% endcontent-ref %}
