Mint a Google Picker access token

Returns a short-lived Drive access token derived from the refresh token stored when the user connected, so an already-connected user can reopen the Google Picker without going through Google's consent popup again.

Responds 409 when there is no live connection (or the stored refresh token has been revoked); the client should fall back to the POST /connect OAuth flow in that case.

curl -X POST "https://v2.api.piktid.com/integrations/google-drive/picker-token"

{
  "picker_access_token": "string",
  "expires_in": 0
}

{
  "error": "Invalid request",
  "detail": [
    {
      "field": null,
      "message": "string",
      "position": "query"
    }
  ]
}