keycloak-scim/topics/service/authorization/whatis-obtain-aat.adoc
2016-06-07 17:24:25 -03:00

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== What is a AAT and How to Obtain it ?
An *Authorization API Token* or *AAT* is a special OAuth2 Access Token with the scope *uma_authorization*.
Client applications can obtain an AAT from {{book.project.name}} just like any other OAuth2 Access Token. Usually, client applications are going to obtain AATs after the user is successfuly
authenticated in {{book.project.name}}. By default the _authorizaton_code_ grant type is used to authenticate users and issue OAuth2 Access Token to the client application acting on their behalf.
For demonstrations purposes, the example below uses Resource Owner Password Credentials Grant Type to ask for a AAT.
```bash
curl -X POST \
-H "Authorization: Basic aGVsbG8td29ybGQtYXV0aHotc2VydmljZTpwYXNzd29yZA==" \
-H "Content-Type: application/x-www-form-urlencoded" \
-d 'username=${username}&password=${user_password}&grant_type=password' \
"http://localhost:8080/auth/realms/${realm_name}/protocol/openid-connect/token"
```
As a result, you will get the following response from the server:
```json
{
"access_token": ${AAT},
"expires_in": 300,
"refresh_expires_in": 1800,
"refresh_token": ${refresh_token},
"token_type": "bearer",
"id_token": ${id_token},
"not-before-policy": 0,
"session_state": "3cad2afc-855b-47b7-8e4d-a21c66e312fb"
}
```
== About the uma_authorization scope
The *uma_authorization* scope indicates that an user consented access to his authorization data to a client application. You can create this
scope a _client role_ and map it to your users.