# Error when I want to get an access token
**URL:** https://discuss.elastic.co/t/error-when-i-want-to-get-an-access-token/200380
**Category:** Elasticsearch
**Tags:** elastic-stack-security
**Created:** [September 20, 2019, 8:49am UTC](https://discuss.elastic.co/t/error-when-i-want-to-get-an-access-token/200380 "2019-09-20T08:49:50Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@K29](https://discuss.elastic.co/u/K29)
#### Post date: [September 20, 2019, 8:49am UTC](https://discuss.elastic.co/t/error-when-i-want-to-get-an-access-token/200380/1 "2019-09-20T08:49:50Z")
Hello,
I'm starting to use ElasticSearch and I try to get a token access. For this, I use postman to test this request.
```
method : POST
endpoint : https://myID.europe-west1.gcp.cloud.es.io:9243/_security/oauth2/token
body JSON : { "grant_type" : "client_credentials" }
OR body JSON : { "grant_type" : "password", "username" : "elastic", "password" : "mypasswd" }
```
When I send my request I get this error:
```
"error": {
"root_cause": [
{
"type": "security_exception",
"reason": "action [cluster:admin/xpack/security/token/create] requires authentication",
"header": {
"WWW-Authenticate": [
"Bearer realm=\"security\"",
"ApiKey",
"Basic realm=\"security\" charset=\"UTF-8\""
]
}
}
],
"type": "security_exception",
"reason": "action [cluster:admin/xpack/security/token/create] requires authentication",
"header": {
"WWW-Authenticate": [
"Bearer realm=\"security\"",
"ApiKey",
"Basic realm=\"security\" charset=\"UTF-8\""
]
}
},
"status": 401
}
```
By default, xpack is installed on ElasticSearch, isn't it? Or, do I need to set more settings?
Thanks for your help.
---
### Author:  [@K29](https://discuss.elastic.co/u/K29)
#### Post date: [September 20, 2019, 11:39am UTC](https://discuss.elastic.co/t/error-when-i-want-to-get-an-access-token/200380/2 "2019-09-20T11:39:51Z")
The basic authentication in the request header did not seem correct. After correcting the code, I can get an access token. I close this issue...
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [October 18, 2019, 11:39am UTC](https://discuss.elastic.co/t/error-when-i-want-to-get-an-access-token/200380/3 "2019-10-18T11:39:55Z")
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