keycloak-scim/topics/service/protection/whatis-obtain-pat.adoc
2016-06-16 14:08:04 -03:00

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== What is a PAT and How to Obtain it ?
A PAT is a special OAuth2 Access Token with the scope *uma_protection*. When you create a resource server, {{book.project.name}} automatically
creates a role _uma_protection_ for the corresponding client application and associated it with the client's service account.
.Service Account granted with uma_protection role
image:../../../images/service/rs-uma-protection-role.png[alt="Service Account granted with uma_protection role"]
Resource servers can obtain a PAT from {{book.project.name}} just like any other OAuth2 Access Token.
```bash
curl -X POST \
-H "Authorization: Basic aGVsbG8td29ybGQtYXV0aHotc2VydmljZTpwYXNzd29yZA==" \
-H "Content-Type: application/x-www-form-urlencoded" \
-d 'grant_type=client_credentials' \
"http://localhost:8080/auth/realms/${realm_name}/protocol/openid-connect/token"
```
In the example above, we are using the *client_credentials* grant type to obtain a PAT from the server. As a result, the server would return a response as follows:
[NOTE]
{{book.project.name}} can authenticate your client application in different ways. We are using *client_credentials* grant type for the sake of
simplicity, which basically requires a _client_id_ and a _client_secret_. You can choose any other supported authentication method.
```bash
{
"access_token": ${PAT},
"expires_in": 300,
"refresh_expires_in": 1800,
"refresh_token": ${refresh_token},
"token_type": "bearer",
"id_token": ${id_token},
"not-before-policy": 0,
"session_state": "ccea4a55-9aec-4024-b11c-44f6f168439e"
}
```