---
layout: api
page_title: 'OIDC Identity Provider'
description: >-
  This is the API documentation for configuring and managing OIDC providers with Vault.
---

## Create or update a provider

This endpoint creates or updates a Provider.

| Method | Path               |
| :----- | :----------------- |
| `POST` | `identity/oidc/provider/:name` |

### Parameters

- `name` `(string: <required>)` – The name of the provider. This parameter is specified as part of the URL.

- `issuer` `(string: <optional>)` - Specifies what will be used as the `scheme://host:port` component for the `iss` claim of ID tokens. This defaults to a URL with
  Vault's `api_addr` as the `scheme://host:port` component and `/v1/:namespace/identity/oidc/provider/:name` as the path
  component. If provided explicitly, it must point to a Vault instance that is network reachable by clients for ID token validation.

- `allowed_client_ids` `([]string: <optional>)` – The client IDs that are permitted to use the provider. If empty, no clients are allowed. If `"*"` is provided, all clients are allowed.

- `scopes_supported` `([]string: <optional>)` – The scopes available for requesting on the provider.

### Sample payload

```json
{
  "allowed_client_ids": ["*"],
  "scopes_supported": ["test-scope"]
}
```

### Sample request

```shell-session
$ curl \
    --header "X-Vault-Token: ..." \
    --request POST \
    --data @payload.json \
    http://127.0.0.1:8200/v1/identity/oidc/provider/test-provider
```

## Read provider by name

This endpoint queries the OIDC provider by its name.

| Method | Path                      |
| :----- | :------------------------ |
| `GET`  | `/identity/oidc/provider/:name` |

### Parameters

- `name` `(string: <required>)` – The name of the provider.

### Sample request

```shell-session
$ curl \
    --header "X-Vault-Token: ..." \
    http://127.0.0.1:8200/v1/identity/oidc/provider/test-provider
```

### Sample response

```json
{
  "data": {
      "allowed_client_ids":["*"],
      "issuer":"",
      "scopes_supported":["test-scope"]
    }
}
```

## List providers

This endpoint returns a list of all OIDC providers.

| Method | Path                            |
| :----- | :------------------------------ |
| `LIST` | `/identity/oidc/provider`           |

### Query parameters

- `allowed_client_id` `(string: <optional>)` – Filters the list of OIDC providers to those
  that allow the given client ID in their set of [allowed_client_ids](/vault/api-docs/secret/identity/oidc-provider#allowed_client_ids).

### Sample request

```shell-session
$ curl \
    --header "X-Vault-Token: ..." \
    --request LIST \
    http://127.0.0.1:8200/v1/identity/oidc/provider
```

### Sample response

```json
{
  "data": {
    "key_info": {
      "default": {
        "allowed_client_ids": [
          "*"
        ],
        "issuer": "http://127.0.0.1:8200/v1/identity/oidc/provider/default",
        "scopes_supported": []
      }
    },
    "keys": [
      "default"
    ]
  }
}
```

## Delete provider by name

This endpoint deletes an OIDC provider.

| Method   | Path                      |
| :------- | :------------------------ |
| `DELETE` | `/identity/oidc/provider/:name` |

### Parameters

- `name` `(string: <required>)` – The name of the provider.

### Sample request

```shell-session
$ curl \
    --header "X-Vault-Token: ..." \
    --request DELETE \
    http://127.0.0.1:8200/v1/identity/oidc/provider/test-provider
```

## Create or update a scope

This endpoint creates or updates a scope.

| Method | Path               |
| :----- | :----------------- |
| `POST` | `identity/oidc/scope/:name` |

### Parameters

- `name` `(string: <required>)` – The name of the scope. This parameter is specified as part of the URL. The `openid` scope name is reserved.

- `template` `(string: <optional>)` - The [JSON template](/vault/docs/concepts/oidc-provider#scopes)
  string for the scope. This may be provided as escaped JSON or base64 encoded JSON.

- `description` `(string: <optional>)` – A description of the scope.

### Sample payload

```json
{
   "template":"{ \"groups\": {{identity.entity.groups.names}} }",
   "description":"A simple scope example."
}
```

### Sample request

```shell-session
$ curl \
    --header "X-Vault-Token: ..." \
    --request POST \
    --data @payload.json \
    http://127.0.0.1:8200/v1/identity/oidc/scope/test-scope
```

## Read scope by name

This endpoint queries a scope by its name.

| Method | Path                      |
| :----- | :------------------------ |
| `GET`  | `/identity/oidc/scope/:name` |

### Parameters

- `name` `(string: <required>)` – The name of the scope.

### Sample request

```shell-session
$ curl \
    --header "X-Vault-Token: ..." \
    http://127.0.0.1:8200/v1/identity/oidc/scope/test-scope
```

### Sample response

```json
{
  "data": {
      "description":"A simple scope example.",
      "template":"{ \"groups\": {{identity.entity.groups.names}} }"
   }
}
```

## List scopes

This endpoint returns a list of all configured scopes.

| Method | Path                            |
| :----- | :------------------------------ |
| `LIST` | `/identity/oidc/scope`           |

### Sample request

```shell-session
$ curl \
    --header "X-Vault-Token: ..." \
    --request LIST \
    http://127.0.0.1:8200/v1/identity/oidc/scope
```

### Sample response

```json
{
  "data": {
      "keys":[
         "test-scope"
      ]
   }
}
```

## Delete scope by name

This endpoint deletes a scope.

| Method   | Path                      |
| :------- | :------------------------ |
| `DELETE` | `/identity/oidc/scope/:name` |

### Parameters

- `name` `(string: <required>)` – The name of the scope.

### Sample request

```shell-session
$ curl \
    --header "X-Vault-Token: ..." \
    --request DELETE \
    http://127.0.0.1:8200/v1/identity/oidc/scope/test-scope
```

## Create or update a client

This endpoint creates or updates a client.

| Method | Path               |
| :----- | :----------------- |
| `POST` | `identity/oidc/client/:name` |

### Parameters

- `name` `(string: <required>)` – The name of the client. This parameter is specified as part of the URL.

- `key` `(string: "default")` – A reference to a [named key](/vault/api-docs/secret/identity/tokens#create-a-named-key)
  resource. This key will be used to sign ID tokens for the client. This cannot be modified
  after creation. If not supplied, defaults to the built-in [default key](/vault/docs/concepts/oidc-provider#keys).

- `redirect_uris` `([]string: <optional>)` - Redirection URI values used by the client. One of these values
  must exactly match the `redirect_uri` parameter value used in each [authentication request](https://openid.net/specs/openid-connect-core-1_0.html#AuthRequest).

- `assignments` `([]string: <optional>)` – A list of assignment resources associated with
  the client. Client assignments limit the Vault entities and groups that are allowed to
  authenticate through the client. By default, no Vault entities are allowed. To allow all
  Vault entities to authenticate through the client, supply the built-in
  [allow_all](/vault/docs/concepts/oidc-provider#assignments) assignment.

- `client_type` `(string: "confidential")` – The [client type](https://datatracker.ietf.org/doc/html/rfc6749#section-2.1)
  based on its ability to maintain confidentiality of credentials. This cannot be modified
  after creation. The following list details the differences between confidential and public
  clients in Vault:
  - `confidential`
    - Capable of maintaining the confidentiality of its credentials
    - Has a client secret
    - Uses the `client_secret_basic` or `client_secret_post` [client authentication method](https://openid.net/specs/openid-connect-core-1_0.html#ClientAuthentication)
    - May use Proof Key for Code Exchange ([PKCE](https://datatracker.ietf.org/doc/html/rfc7636))
      for the authorization code flow
  - `public`
    - Not capable of maintaining the confidentiality of its credentials
    - Does not have a client secret
    - Uses the `none` [client authentication method](https://openid.net/specs/openid-connect-core-1_0.html#ClientAuthentication)
    - Must use Proof Key for Code Exchange ([PKCE](https://datatracker.ietf.org/doc/html/rfc7636))
      for the authorization code flow

- `id_token_ttl` `(int or duration: "24h")` – The time-to-live for ID tokens obtained by the client.
  Accepts [duration format strings](/vault/docs/concepts/duration-format). The value should be less than the `verification_ttl`
  on the key.

- `access_token_ttl` `(int or duration: "24h")` – The time-to-live for access tokens obtained by the client.
  Accepts [duration format strings](/vault/docs/concepts/duration-format).

### Sample payload

```json
{
   "key":"test-key",
   "access_token_ttl":"30m",
   "id_token_ttl":"1h"
}
```

### Sample request

```shell-session
$ curl \
    --header "X-Vault-Token: ..." \
    --request POST \
    --data @payload.json \
    http://127.0.0.1:8200/v1/identity/oidc/client/test-client
```

## Read client by name

This endpoint queries a client by its name.

| Method | Path                      |
| :----- | :------------------------ |
| `GET`  | `/identity/oidc/client/:name` |

### Parameters

- `name` `(string: <required>)` – The name of the client.

### Sample request

```shell-session
$ curl \
    --header "X-Vault-Token: ..." \
    http://127.0.0.1:8200/v1/identity/oidc/client/test-client
```

### Sample response

```json
{
  "data":{
      "access_token_ttl":1800,
      "assignments":[],
      "client_id":"014zXvcvbvIZWwD5NfD1Uzmv7c5JBRMb",
      "client_secret":"hvo_secret_bZtgQPBZaJXK7F5vOI7JlvEuLOfOUS7DmwynFjE3xKcsen7TyowqPFfYFXG2tbWM",
      "client_type": "confidential",
      "id_token_ttl":3600,
      "key":"test-key",
      "redirect_uris":[]
   }
}
```

## List clients

This endpoint returns a list of all configured clients.

| Method | Path                            |
| :----- | :------------------------------ |
| `LIST` | `/identity/oidc/client`         |

### Sample request

```shell-session
$ curl \
    --header "X-Vault-Token: ..." \
    --request LIST \
    http://127.0.0.1:8200/v1/identity/oidc/client
```

### Sample response

```json
{
  "data": {
    "key_info": {
      "my-app": {
        "access_token_ttl": 86400,
        "assignments": [
          "allow_all"
        ],
        "client_id": "wGr981oYLJbcr4zrUriYxjxSc80JL7HW",
        "client_type": "confidential",
        "id_token_ttl": 86400,
        "key": "default",
        "redirect_uris": [
          "http://localhost:5555/callback"
        ]
      }
    },
    "keys": [
      "my-app"
    ]
  }
}
```

## Delete client by name

This endpoint deletes a client.

| Method   | Path                      |
| :------- | :------------------------ |
| `DELETE` | `/identity/oidc/client/:name` |

### Parameters

- `name` `(string: <required>)` – The name of the client.

### Sample request

```shell-session
$ curl \
    --header "X-Vault-Token: ..." \
    --request DELETE \
    http://127.0.0.1:8200/v1/identity/oidc/client/test-client
```

## Create or update an assignment

This endpoint creates or updates an assignment.

| Method | Path               |
| :----- | :----------------- |
| `POST` | `identity/oidc/assignment/:name` |

### Parameters

- `name` `(string: <required>)` – The name of the assignment. This parameter is specified as part of the URL.

- `entity_ids` `([]string: <optional>)` - A list of Vault [entity](/vault/docs/secrets/identity#entities-and-aliases) IDs.

- `group_ids` `([]string: <optional>)` – A list of Vault [group](/vault/docs/secrets/identity#identity-groups) IDs.

### Sample payload

```json
{
   "group_ids":["262ca5b9-7b69-0a84-446a-303dc7d778af"],
   "entity_ids":["b6094ac6-baf4-6520-b05a-2bd9f07c66da"]
}
```

### Sample request

```shell-session
$ curl \
    --header "X-Vault-Token: ..." \
    --request POST \
    --data @payload.json \
    http://127.0.0.1:8200/v1/identity/oidc/assignment/test-assignment
```

## Read assignment by name

This endpoint queries an assignment by its name.

| Method | Path                      |
| :----- | :------------------------ |
| `GET`  | `/identity/oidc/assignment/:name` |

### Parameters

- `name` `(string: <required>)` – The name of the assignment.

### Sample request

```shell-session
$ curl \
    --header "X-Vault-Token: ..." \
    http://127.0.0.1:8200/v1/identity/oidc/assignment/test-assignment
```

### Sample response

```json
{
  "data":{
      "entity_ids":[
         "b6094ac6-baf4-6520-b05a-2bd9f07c66da"
      ],
      "group_ids":[
         "262ca5b9-7b69-0a84-446a-303dc7d778af"
      ]
   }
}
```

## List assignments

This endpoint returns a list of all configured assignments.

| Method | Path                            |
| :----- | :------------------------------ |
| `LIST` | `/identity/oidc/assignment`           |

### Sample request

```shell-session
$ curl \
    --header "X-Vault-Token: ..." \
    --request LIST \
    http://127.0.0.1:8200/v1/identity/oidc/assignment
```

### Sample response

```json
{
  "data": {
      "keys":[
         "test-assignment"
      ]
   }
}
```

## Delete assignment by name

This endpoint deletes an assignment.

| Method   | Path                      |
| :------- | :------------------------ |
| `DELETE` | `/identity/oidc/assignment/:name` |

### Parameters

- `name` `(string: <required>)` – The name of the assignment.

### Sample request

```shell-session
$ curl \
    --header "X-Vault-Token: ..." \
    --request DELETE \
    http://127.0.0.1:8200/v1/identity/oidc/assignment/test-assignment
```

## Read provider OpenID configuration

Returns OpenID Connect Metadata for a named OIDC provider. The response is a
compliant [OpenID Provider Configuration Response](https://openid.net/specs/openid-connect-discovery-1_0.html#ProviderConfigurationResponse).

| Method | Path                                                             |
| :----- | :--------------------------------------------------------------- |
| `GET`  | `/identity/oidc/provider/:name/.well-known/openid-configuration` |

### Parameters

- `name` `(string: <required>)` – The name of the provider. This parameter is specified as part of the URL.

### Sample request

```shell-session
$ curl \
    --request GET \
    http://127.0.0.1:8200/v1/identity/oidc/provider/test-provider/.well-known/openid-configuration
```

### Sample response

```json
{
  "issuer": "http://127.0.0.1:8200/v1/identity/oidc/provider/test-provider",
  "jwks_uri": "http://127.0.0.1:8200/v1/identity/oidc/provider/test-provider/.well-known/keys",
  "authorization_endpoint": "http://127.0.0.1:8200/ui/vault/identity/oidc/provider/test-provider/authorize",
  "token_endpoint": "http://127.0.0.1:8200/v1/identity/oidc/provider/test-provider/token",
  "userinfo_endpoint": "http://127.0.0.1:8200/v1/identity/oidc/provider/test-provider/userinfo",
  "request_parameter_supported": false,
  "request_uri_parameter_supported": false,
  "id_token_signing_alg_values_supported": [
    "RS256",
    "RS384",
    "RS512",
    "ES256",
    "ES384",
    "ES512",
    "EdDSA"
  ],
  "response_types_supported": [
    "code"
  ],
  "scopes_supported": [
    "openid"
  ],
  "subject_types_supported": [
    "public"
  ],
  "grant_types_supported": [
    "authorization_code"
  ],
  "token_endpoint_auth_methods_supported": [
    "client_secret_basic",
    "client_secret_post",
    "none"
  ],
  "code_challenge_methods_supported": [
    "plain",
    "S256"
  ]
}
```

## Read provider public keys

Query this path to retrieve the public portion of keys for an OIDC provider.
Clients can use them to validate the authenticity of an identity token.

| Method | Path                                             |
| :----- | :----------------------------------------------- |
| `GET`  | `/identity/oidc/provider/:name/.well-known/keys` |

### Parameters

- `name` `(string: <required>)` – The name of the provider. This parameter is specified as part of the URL.

### Sample request

```shell-session
$ curl \
    --request GET \
    http://127.0.0.1:8200/v1/identity/oidc/provider/test-provider/.well-known/keys
```

### Sample response

```json
{
  "keys": [
    {
      "use": "sig",
      "kty": "RSA",
      "kid": "ee7c0920-fdb9-5c1a-9c69-6dab710d1a09",
      "alg": "RS256",
      "n": "zdFjUV9lBw5nQPvTtwH-gzKgRG7iepvYbFoc2hNB0-inJL25oh-mvNW3GS8jPY5XHLsiWa_1TKKE99JrKQgane2C96soFeOvR7SozbCeH8_FpZelH1Pym1NV038j05Vp87uB9FeKPsy1PNOLPTs_Fp42JIAenly7ojYwPp1s61p9V0U9rOhtldY7GkXHLN9s8v3aJjxqrTS3Puhs9MFS7EgRrEDAc69uiLXCoYXKygjXddvJi6j446XxnO2eTRMGl1f2t04s_vDgVnFQgjQSKYWPbOMhf2slkeR47fqE3qqUDzINxauqMbkW-PlLP9IN0crR2uC07cG2os4RxN4YHw",
      "e": "AQAB"
    },
    {
      "use": "sig",
      "kty": "RSA",
      "kid": "6e468221-b7c2-9d2d-744d-33b7ae0357cb",
      "alg": "RS256",
      "n": "rMaucILJKiFg_lkCE8ZEV_8jiYdaVDjKkc-8XPBW8S34wIRl1EbsgCYfMHtJnIJ_3eUgOVorW5KVeN9C8W16LR3lhqRWS9y4qlt0AcWpOvsmxr5q5dS_QqgCjeftCKwJzUsMi5bMW8wKjRZdd-qLz6X1rVSZWX82G0So8nRBg9d3MNJbKcdIJrRbrxWkm8U9xMqRouzbyQ2Hsp2rRVgGh7yjEA6daI5Ao8UsPdBmlCM9oKZ1_Kje5JTfZKeHlT-58vn_ylCjMVlapLuUsDN6He2kPVyOzGbie297VOfjmB7QX0ah1f7Ni1UJFJYHrVK9wMfCLTltSFZBcQ9--FlVdQ",
      "e": "AQAB"
    }
  ]}
```

## Authorization endpoint

Provides the [Authorization Endpoint](https://openid.net/specs/openid-connect-core-1_0.html#AuthorizationEndpoint)
for an OIDC provider. This allows OIDC clients to request an authorization code
to be used for the [Authorization Code Flow](https://openid.net/specs/openid-connect-core-1_0.html#CodeFlowAuth).

| Method      | Path                                      |
| :---------- | :---------------------------------------- |
| `GET/POST`  | `/identity/oidc/provider/:name/authorize` |

### Parameters

- `name` `(string: <required>)` - The name of the provider. This parameter is specified as part of the URL.

- `scope` `(string: <required>)` - A space-delimited list of scopes to be requested. The `openid` scope is required.

- `response_type` `(string: <required>)` - The OIDC authentication flow to be used. The following response types are supported: `code`.

- `client_id` `(string: <required>)` - The ID of the requesting client.

- `redirect_uri` `(string: <required>)` - The redirection URI to which the response will be sent.

- `state` `(string: <optional>)` - A value used to maintain state between the authentication request and client.

- `nonce` `(string: <optional>)` - A value that is returned in the ID token nonce claim. It is used to mitigate replay attacks, so we *strongly encourage* providing this optional parameter.

- `max_age` `(integer: <optional>)` - The allowable elapsed time in seconds since the last
  time the end-user was actively authenticated.

- `code_challenge` `(string: <optional>)` - The [PKCE](https://datatracker.ietf.org/doc/html/rfc7636)
  code challenge derived from the client's code verifier. Optional for `confidential` clients.
  Required for `public` clients.

- `code_challenge_method` `(string: "plain")` - The method that was used to derive the
  [PKCE](https://datatracker.ietf.org/doc/html/rfc7636) code challenge. The following
  methods are supported: `S256`, `plain`.

### Sample request

```shell-session
$ curl \
    --request GET \
    --header "X-Vault-Token: ..." \
    -G \
    -d "response_type=code" \
    -d "client_id=$CLIENT_ID" \
    -d "state=af0ifjsldkj" \
    -d "nonce=abcdefghijk" \
    --data-urlencode "scope=openid" \
    --data-urlencode "redirect_uri=http://127.0.0.1:8251/callback" \
    http://127.0.0.1:8200/v1/identity/oidc/provider/test-provider/authorize
```

### Sample response

```json
{
  "code": "BDSc9kVYljxND93YpveBuJtSvguM3AWe",
  "state": "af0ifjsldkj"
}
```

## Token endpoint

Provides the [Token Endpoint](https://openid.net/specs/openid-connect-core-1_0.html#TokenEndpoint)
for an OIDC provider.

| Method  | Path                                  |
| :------ | :------------------------------------ |
| `POST`  | `/identity/oidc/provider/:name/token` |

### Parameters

- `name` `(string: <required>)` - The name of the provider. This parameter is
  specified as part of the URL.

- `code` `(string: <required>)` - The authorization code received from the
  provider's authorization endpoint.

- `grant_type` `(string: <required>)` - The authorization grant type. The
  following grant types are supported: `authorization_code`.

- `redirect_uri` `(string: <required>)` - The callback location where the
  authorization request was sent. This must match the `redirect_uri` used when the
  original authorization code was generated.

- `client_id` `(string: <optional>)` - The ID of the requesting client. This parameter
  is required for `public` clients which do not have a client secret or `confidential`
  clients using the `client_secret_post` client authentication method.

- `client_secret` `(string: <optional>)` - The secret of the requesting client. This
  parameter is required for `confidential` clients using the `client_secret_post` client
  authentication method.

- `code_verifier` `(string: <optional>)` - The code verifier associated with the given
  `code`. Required for authorization codes that were granted using [PKCE](https://datatracker.ietf.org/doc/html/rfc7636).
  Required for `public` clients.

### Headers

- `Authorization: Basic` `(string: <optional>)` - An HTTP Basic authentication scheme header
  including the `client_id` and `client_secret` as described in the [client_secret_basic](https://openid.net/specs/openid-connect-core-1_0.html#ClientAuthentication)
  authentication method. This header is only required for `confidential` clients using
  the `client_secret_basic` client authentication method.

### Sample request

```shell-session
$ BASIC_AUTH_CREDS=$(printf "%s:%s" "$CLIENT_ID" "$CLIENT_SECRET" | base64)
$ curl \
    --request POST \
    --header "Authorization: Basic $BASIC_AUTH_CREDS" \
    -H 'Content-Type: application/x-www-form-urlencoded' \
    -d "code=4RL50r78p8HsNJY0GVUNGfjLHnpkRf3N" \
    -d "grant_type=authorization_code" \
    -d "redirect_uri=http://127.0.0.1:8251/callback" \
    http://127.0.0.1:8200/v1/identity/oidc/provider/test-provider/token
```

### Sample response

```json
{
  "access_token": "b.AAAAAQJEH5VXjfjUESCwySTKk2MS1MGVNc9oU-N2EyoLKVo9SYa-NnOWAXloYfrlO45UWC3R1PC5ZShl3JdmRJ0264julNnlBduSNXJkYjgCQsFQwXTKHcjhqdNsmJNMWiPaHPn5NLSpNQVtzAxfHADt4r9rmX-UEG5seOWbmK_Z5WwS_4a8-wcVPB7FpOGzfBydP7yMxHu-3H1TWyQvYVr28XUfYxcBbdlzxhJn0yqkWItgmZ25xEOp7SW7Pg4tYB7AXfk",
  "expires_in": 3600,
  "id_token": "eyJhbGciOiJSUzI1NiIsImtpZCI6ImEzMjk5ZWVmLTllNDEtOGNiYS1kNWExLTZmZWM2NjIyODRjYyJ9. .ehdLj6jnrJvltar1kkVSyNK48w2M5vkh5DTFJFZDqatnDWhQbbKGLZnVgd3wD6KPboXRaUwhGe4jDiTIiSoJaovOhsia77NKukym_ROLvGZw-LG7xaYkzJLnmEfeQhelLxWe0DHPROB7VXcFqBx8vX5hkuoVyqrB87vwiobK42pDPZ9MRsmbM2yzBC3wrnT7RQFtT4q2Bbyt9YIAHUaq9rU0PwJRoNISw6of1uQHo3_UzLdpwth7PEOEcI47OBGFA5vR_Gw3ocREfSrUWfCWOInAKCT43cImvg4Bts6qiZYfv9n-iNBq4AihGqq_VEF-hB1Hrprn7VgnEZ1VjUHaQQ",
  "token_type": "Bearer"
}
```

## UserInfo endpoint

Provides the [UserInfo Endpoint](https://openid.net/specs/openid-connect-core-1_0.html#UserInfo)
for an OIDC provider. The UserInfo Endpoint is an OAuth 2.0 Protected
Resource that returns Claims about the authenticated End-User.

| Method  | Path                                     |
| :------ | :--------------------------------------- |
| `POST`  | `/identity/oidc/provider/:name/userinfo` |

### Parameters

- `name` `(string: <required>)` - The name of the provider. This parameter is
specified as part of the URL.

### Headers

- Access Token `(string: <required>)` - The access token provided by the
`Authorization: Bearer <access_token>` HTTP header acquired from the authorization
endpoint.

### Sample request

```shell-session
$ curl \
    -X GET \
    --header "Authorization: Bearer $ACCESS_TOKEN" \
    http://127.0.0.1:8200/v1/identity/oidc/provider/test-provider/userinfo
```

### Sample response

```json
{
  "contact": {
    "email": "vault@hashicorp.com",
    "phone_number": "123-456-7890"
  },
  "groups": [
    "engineering"
  ],
  "sub": "5000796e-36df-0d8c-6460-81853d9b2667",
  "username": "end-user"}
```
