[Go][Hydra] client library error when decoding GetLoginRequest response that contains oidc context

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Describe the bug

Some of our requests to the /admin/oauth2/auth/requests/login endpoint are returning an unmarshal error after upgrading to 1.11.8.

After some debugging I found out that it fails every time Hydra returns a non-empty oidc_context. id_token_hint_claims field. According to the spec this field should be an object that contains any kind of field. But the model is defined as follows: https://github.com/ory/sdk/blob/5bc3139802ce7103ee9a5426f161d47ed1763283/clients/hydra/go/model_open_id_connect_context.go#L25

Reproducing the bug

Since this is a serialization issue I would say there are lots of ways of reproducing this.

We are using the PKCE flow in several apps. And we wanted to mimic the prompt=select_account behaviour. For that we are using the prompt=login parameter to send users to the login screen (https://github.com/ory/hydra/issues/1943). This allows our users to easily switch accounts, but this also makes the oidc_context.id_token_hint_claims to be filled.

Log in with a user: goes back to app with a valid token. ✅
Log in with another user: goes back to app with a valid token. ✅
Refresh the screen: this error happens. ❌

Relevant log output

json: cannot unmarshal string into Go struct field OpenIDConnectContext.oidc_context.id_token_hint_claims of type map[string]interface {}

Relevant configuration

No response

Version

1.11.8

On which operating system are you observing this issue?

macOS

In which environment are you deploying?

Docker

Additional Context

No response

ory / sdk