Shuffle Deck

HTTP 500: "# CaseClauseError at GET /api/v1/cards/shuffle/abc123\n\nException:\n\n    ** (CaseClauseError) no case clause matching:\n    \n        {:ok,\n         %Req.Response{\n           status: 404,\n           headers: %{\n             \"access-control-allow-origin\" => [\"*\"],\n             \"alt-svc\" => [\"h3=\\\":443\\\"; ma=86400\"],\n             \"cf-cache-status\" => [\"DYNAMIC\"],\n             \"cf-ray\" => [\"9e7bbdbd7cd464b2-FRA\"],\n             \"connection\" => [\"keep-alive\"],\n             \"content-type\" => [\"application/json\"],\n             \"date\" => [\"Sun, 05 Apr 2026 21:45:40 GMT\"],\n             \"nel\" => [\"{\\\"report_to\\\":\\\"cf-nel\\\",\\\"success_fraction\\\":0.0,\\\"max_age\\\":604800}\"],\n             \"referrer-policy\" => [\"same-origin\"],\n             \"report-to\" => [\"{\\\"group\\\":\\\"cf-nel\\\",\\\"max_age\\\":604800,\\\"endpoints\\\":[{\\\"url\\\":\\\"https://a.nel.cloudflare.com/report/v4?s=rphnXsWWobD0Hd5W20KXcMLvm1Hl%2F4UVSHmPE6glh484LPGsEL5f%2Fye8ShjjU5AvVCOTDFU8m9wRlHBF2BxUD5rdKcYbsUnYRZCzCmyFEnLENE6uW83jKarGJ737lLZFToOyil0%3D\\\"}]}\"],\n             \"server\" => [\"cloudflare\"],\n             \"transfer-encoding\" => [\"chunked\"],\n             \"vary\" => [\"Origin\"],\n             \"x-content-type-options\" => [\"nosniff\"],\n             \"x-frame-options\" => [\"DENY\"]\n           },\n           body: %{\"error\" => \"Deck ID does not exist.\", \"success\" => false},\n           trailers: %{},\n           private: %{}\n         }}\n    \n        lib/app/cards.ex:33: App.Cards.reshuffle/1\n        lib/app_web/controllers/api/v1/cards_controller.ex:25: AppWeb.API.V1.CardsController.shuffle/2\n        lib/app_web/controllers/api/v1/cards_controller.ex:1: AppWeb.API.V1.CardsController.action/2\n        lib/app_web/controllers/api/v1/cards_controller.ex:1: AppWeb.API.V1.CardsController.phoenix_controller_pipeline/2\n        (phoenix 1.8.5) lib/phoenix/router.ex:416: Phoenix.Router.__call__/5\n        (app 0.1.0) lib/app_web/endpoint.ex:1: AppWeb.Endpoint.plug_builder_call/2\n        (app 0.1.0) deps/plug/lib/plug/debugger.ex:155: AppWeb.Endpoint.\"call (overridable 3)\"/2\n        (app 0.1.0) lib/app_web/endpoint.ex:1: AppWeb.Endpoint.call/2\n        (phoenix 1.8.5) lib/phoenix/endpoint/sync_code_reload_plug.ex:22: Phoenix.Endpoint.SyncCodeReloadPlug.do_call/4\n        (bandit 1.10.3) lib/bandit/pipeline.ex:131: Bandit.Pipeline.call_plug!/2\n        (bandit 1.10.3) lib/bandit/pipeline.ex:42: Bandit.Pipeline.run/5\n        (bandit 1.10.3) lib/bandit/http1/handler.ex:13: Bandit.HTTP1.Handler.handle_data/3\n        (bandit 1.10.3) lib/bandit/delegating_handler.ex:18: Bandit.DelegatingHandler.handle_data/3\n        (bandit 1.10.3) lib/bandit/delegating_handler.ex:8: Bandit.DelegatingHandler.handle_continue/2\n        (stdlib 7.1) gen_server.erl:2424: :gen_server.try_handle_continue/3\n        (stdlib 7.1) gen_server.erl:2291: :gen_server.loop/4\n        (stdlib 7.1) proc_lib.erl:333: :proc_lib.init_p_do_apply/3\n    \n\n## Connection details\n\n### Params\n\n    %{\"deck_id\" => \"abc123\"}\n\n### Request info\n\n  * URI: http://localhost:4000/api/v1/cards/shuffle/abc123\n  * Query string: \n\n### Headers\n  \n  * accept-encoding: gzip\n  * host: localhost:4000\n  * user-agent: req/0.5.17\n\n### Session\n\n    %{}\n"