invalid token_type

[TuxCoder]

Describe the bug

introspect endpoint returns different token_type.

When I request an acces_token this is the result:

{
  "access_token":"xxx.xxx-xxx",
  "expires_in":3600,
  "id_token":"xxx.xxx.xxx-xxx-xxx-xx-xx-xxx",
  "scope":"openid email email_access",

  **"token_type":"bearer"**
}

The introspect API return:

{
  "active":true,
  "scope":"openid email email_access",
  "client_id":"roundcube",
  "sub":"xxxx",
  "exp":1593543859,
  "iat":1593540258,
  "iss":"https://oauth2.xxx.xxx/",

  **"token_type":"access_token",**

  "ext":{ ".....": "..." }
}

Reproducing the bug

Request an access token.
Get introspect information for this token.

Expected behavior

In RFC7662 2.2 the token_type refers to RFC6749 5.1 refers to section 7.1.

There is only two types of token_types defined:

• bearer
• mac

Also dovecot checks if this token_type in introspect is bearer

A clear and concise description of what you expected to happen.

Environment

• Version: v1.5.2
• Environment: Debian, nginx proxy

Additional context

Tested with dovecot as resources server and roundcube PR as client.

[TuxCoder]

sorry duplicate from #1762