[[java-rest-high-security-create-token]]
=== Create Token API

[[java-rest-high-security-create-token-request]]
==== Request
The `CreateTokenRequest` supports three different OAuth2 _grant types_:

===== Password Grants

["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/SecurityDocumentationIT.java[create-token-password-request]
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===== Refresh Token Grants
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/SecurityDocumentationIT.java[create-token-refresh-request]
--------------------------------------------------

===== Client Credential Grants
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/SecurityDocumentationIT.java[create-token-client-credentials-request]
--------------------------------------------------

[[java-rest-high-security-create-token-execution]]
==== Execution

Creating a OAuth2 security token can be performed by passing the appropriate request to the
 `security().createToken()` method:

["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/SecurityDocumentationIT.java[create-token-execute]
--------------------------------------------------

[[java-rest-high-security-create-token-response]]
==== Response

The returned `CreateTokenResponse` contains the following properties:

`accessToken`:: This is the newly created access token.
   It can be used to authenticate to the Elasticsearch cluster.
`type`:: The type of the token, this is always `"Bearer"`.
`expiresIn`:: The length of time until the token will expire.
   The token will be considered invalid after that time.
`scope`:: The scope of the token. May be `null`.
`refreshToken`:: A secondary "refresh" token that may be used to extend
 the life of an access token. May be `null`.

["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/SecurityDocumentationIT.java[create-token-response]
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<1> The `accessToken` can be used to authentication to Elasticsearch.
<2> The `refreshToken` can be used in to create a new `CreateTokenRequest` with a `refresh_token` grant.

[[java-rest-high-security-create-token-async]]
==== Asynchronous Execution

This request can be executed asynchronously using the `security().createTokenAsync()`
method:

["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/SecurityDocumentationIT.java[create-token-execute-async]
--------------------------------------------------
<1> The `CreateTokenRequest` to execute and the `ActionListener` to use when
the execution completes

The asynchronous method does not block and returns immediately. Once the request
has completed the `ActionListener` is called back using the `onResponse` method
if the execution successfully completed or using the `onFailure` method if
it failed.

A typical listener for a `CreateTokenResponse` looks like:

["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/SecurityDocumentationIT.java[create-token-execute-listener]
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<1> Called when the execution is successfully completed. The response is
provided as an argument
<2> Called in case of failure. The raised exception is provided as an argument