Function update_identity_settings 

pub async fn update_identity_settings(
    __arg0: State<App>,
    tn_id: TnId,
    __arg2: IdTag,
    __arg3: Path<String>,
    __arg4: OptionalRequestId,
    __arg5: Json<UpdateIdentitySettingsRequest>,
) -> ClResult<(StatusCode, Json<ApiResponse<IdentityResponse>>)>

PATCH /api/idp/identities/:id - Update identity settings