Redirect to GET /admin/dashboard fails

I've been following the book up to the implementation of logging into /dashboard (page 371). After introducing the seeded user I cannot log into /dashboard. I have a reason to believe that the credentials are correct:
We can observe that there is indeed a redirect to dashboard which doesn't happen if I mess up the credentials. My assumption is `actix_session` fails in some way, if we look at the logs I've captured the `userId` key (I use camelCase in my version) is indeed stored in the session, but when it's time to retrieve it back the session is for some reason empty:
```rs
2023-12-26T20:00:22.680563Z ERROR zero2prod::sessionState: State after inserting: {
"userId": "\"ddf8994f-d522-4659-8d02-c1d479057be6\"",
}
at src/sessionState.rs:19
in zero2prod::routes::login::post::login with userId: ddf8994f-d522-4659-8d02-c1d479057be6
in tracing_actix_web::root_span_builder::HTTP request with http.method: POST, http.route: /login, http.flavor: 1.1, http.scheme: http, http.host: :8000, http.client_ip: , http.user_agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:121.0) Gecko/20100101 Firefox/121.0, http.target: /login, otel.name: HTTP POST /login, otel.kind: "server", request_id: 496549a4-556e-4e9e-892f-2203ead118ed

2023-12-26T20:00:22.680673Z INFO zero2prod::routes::login::post: close, time.busy: 99.0ms, time.idle: 481ms
at src/routes/login/post.rs:22
in zero2prod::routes::login::post::login with userId: ddf8994f-d522-4659-8d02-c1d479057be6
in tracing_actix_web::root_span_builder::HTTP request with http.method: POST, http.route: /login, http.flavor: 1.1, http.scheme: http, http.host: :8000, http.client_ip: , http.user_agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:121.0) Gecko/20100101 Firefox/121.0, http.target: /login, otel.name: HTTP POST /login, otel.kind: "server", request_id: 496549a4-556e-4e9e-892f-2203ead118ed

2023-12-26T20:00:22.690216Z INFO tracing_actix_web::root_span_builder: close, time.busy: 100ms, time.idle: 491ms
at /home/owner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-actix-web-0.5.1/src/root_span_builder.rs:40
in tracing_actix_web::root_span_builder::HTTP request with http.method: POST, http.route: /login, http.flavor: 1.1, http.scheme: http, http.host: :8000, http.client_ip: , http.user_agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:121.0) Gecko/20100101 Firefox/121.0, http.target: /login, otel.name: HTTP POST /login, otel.kind: "server", request_id: 496549a4-556e-4e9e-892f-2203ead118ed, http.status_code: 303, otel.status_code: "OK"

2023-12-26T20:00:22.708296Z ERROR zero2prod::sessionState: State before getting: {}
at src/sessionState.rs:25
in tracing_actix_web::root_span_builder::HTTP request with http.method: GET, http.route: /admin/dashboard, http.flavor: 1.1, http.scheme: http, http.host: :8000, http.client_ip: , http.user_agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:121.0) Gecko/20100101 Firefox/121.0, http.target: /admin/dashboard, otel.name: HTTP GET /admin/dashboard, otel.kind: "server", request_id: 7dbcb599-e4ac-41dc-bcdb-158f2e68c0d2
```

(I log them as ERROR so that it appears as red in the logs and is easier to spot)

I repeated this experiment with the main branch version of the app. After cloning it, running both init scripts (and changing the host in `local.yaml` from 127.0.0.1 to 0.0.0.0) I get the same behavior. I'll attach the logs (with minor edits):
```rs
{
"msg": "starting 8 workers",
"time": "2023-12-26T20:07:28.836994354Z",
"target": "actix_server::builder",
"line": 240,
"file": "/home/owner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/actix-server-2.3.0/src/builder.rs"
}
{
"msg": "Tokio runtime found; starting in existing Tokio runtime",
"time": "2023-12-26T20:07:28.837272554Z",
"target": "actix_server::server",
"line": 197,
"file": "/home/owner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/actix-server-2.3.0/src/server.rs"
}
{
"msg": "[TRY_EXECUTE_TASK - START]",
"time": "2023-12-26T20:07:28.838262754Z",
"target": "zero2prod::issue_delivery_worker",
"line": 33,
"file": "src/issue_delivery_worker.rs"
}
{
"msg": "[DEQUEUE_TASK - START]",
"time": "2023-12-26T20:07:28.838409454Z",
"target": "zero2prod::issue_delivery_worker",
"line": 88,
"file": "src/issue_delivery_worker.rs"
}
{
"msg": "[DEQUEUE_TASK - END]",
"time": "2023-12-26T20:07:28.943876051Z",
"target": "zero2prod::issue_delivery_worker",
"line": 88,
"file": "src/issue_delivery_worker.rs",
"elapsed_milliseconds": 105
}
{
"msg": "[TRY_EXECUTE_TASK - END]",
"time": "2023-12-26T20:07:28.943966251Z",
"target": "zero2prod::issue_delivery_worker",
"line": 33,
"file": "src/issue_delivery_worker.rs",
"elapsed_milliseconds": 105
}
{
"msg": "[HTTP REQUEST - START]",
"time": "2023-12-26T20:07:31.128064821Z",
"target": "tracing_actix_web::root_span_builder",
"line": 41,
"file": "/home/owner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-actix-web-0.7.6/src/root_span_builder.rs",
"http.client_ip": "",
"http.route": "/login",
"otel.name": "HTTP POST /login",
"http.scheme": "http",
"otel.kind": "server",
"request_id": "96888033-a15a-49e1-a594-276a55c467a5",
"http.method": "POST",
"http.flavor": "1.1",
"http.host": ":8000",
"http.target": "/login"
}
{
"msg": "[LOGIN - START]",
"time": "2023-12-26T20:07:31.128609719Z",
"target": "zero2prod::routes::login::post",
"line": 19,
"file": "src/routes/login/post.rs",
"http.client_ip": "",
"http.route": "/login",
"otel.name": "HTTP POST /login",
"http.scheme": "http",
"otel.kind": "server",
"request_id": "96888033-a15a-49e1-a594-276a55c467a5",
"http.method": "POST",
"http.flavor": "1.1",
"http.host": ":8000",
"http.target": "/login"
}
{
"msg": "[VALIDATE CREDENTIALS - START]",
"time": "2023-12-26T20:07:31.128855119Z",
"target": "zero2prod::authentication::password",
"line": 41,
"file": "src/authentication/password.rs",
"http.client_ip": "",
"http.route": "/login",
"otel.name": "HTTP POST /login",
"http.scheme": "http",
"otel.kind": "server",
"request_id": "96888033-a15a-49e1-a594-276a55c467a5",
"http.method": "POST",
"username": "admin",
"http.flavor": "1.1",
"http.host": ":8000",
"http.target": "/login"
}
{
"msg": "[GET STORED CREDENTIALS - START]",
"time": "2023-12-26T20:07:31.128987118Z",
"target": "zero2prod::authentication::password",
"line": 21,
"file": "src/authentication/password.rs",
"http.client_ip": "",
"http.route": "/login",
"otel.name": "HTTP POST /login",
"http.scheme": "http",
"otel.kind": "server",
"request_id": "96888033-a15a-49e1-a594-276a55c467a5",
"http.method": "POST",
"username": "admin",
"http.flavor": "1.1",
"http.host": ":8000",
"http.target": "/login"
}
{
"msg": "[GET STORED CREDENTIALS - END]",
"time": "2023-12-26T20:07:31.267104282Z",
"target": "zero2prod::authentication::password",
"line": 21,
"file": "src/authentication/password.rs",
"http.client_ip": "",
"http.route": "/login",
"otel.name": "HTTP POST /login",
"http.scheme": "http",
"otel.kind": "server",
"request_id": "96888033-a15a-49e1-a594-276a55c467a5",
"http.method": "POST",
"elapsed_milliseconds": 137,
"username": "admin",
"http.flavor": "1.1",
"http.host": ":8000",
"http.target": "/login"
}
{
"msg": "[VALIDATE CREDENTIALS - START]",
"time": "2023-12-26T20:07:31.267516881Z",
"target": "zero2prod::authentication::password",
"line": 72,
"file": "src/authentication/password.rs",
"http.client_ip": "",
"http.route": "/login",
"otel.name": "HTTP POST /login",
"http.scheme": "http",
"otel.kind": "server",
"request_id": "96888033-a15a-49e1-a594-276a55c467a5",
"http.method": "POST",
"username": "admin",
"http.flavor": "1.1",
"http.host": ":8000",
"http.target": "/login"
}
{
"msg": "[VALIDATE CREDENTIALS - END]",
"time": "2023-12-26T20:07:31.985535235Z",
"target": "zero2prod::authentication::password",
"line": 72,
"file": "src/authentication/password.rs",
"http.client_ip": "",
"http.route": "/login",
"otel.name": "HTTP POST /login",
"http.scheme": "http",
"otel.kind": "server",
"request_id": "96888033-a15a-49e1-a594-276a55c467a5",
"http.method": "POST",
"elapsed_milliseconds": 717,
"username": "admin",
"http.flavor": "1.1",
"http.host": ":8000",
"http.target": "/login"
}
{
"msg": "[VALIDATE CREDENTIALS - END]",
"time": "2023-12-26T20:07:31.985977234Z",
"target": "zero2prod::authentication::password",
"line": 41,
"file": "src/authentication/password.rs",
"http.client_ip": "",
"http.route": "/login",
"otel.name": "HTTP POST /login",
"http.scheme": "http",
"otel.kind": "server",
"request_id": "96888033-a15a-49e1-a594-276a55c467a5",
"http.method": "POST",
"elapsed_milliseconds": 857,
"username": "admin",
"http.flavor": "1.1",
"http.host": ":8000",
"http.target": "/login"
}
{
"msg": "[LOGIN - END]",
"time": "2023-12-26T20:07:31.986226634Z",
"target": "zero2prod::routes::login::post",
"line": 19,
"file": "src/routes/login/post.rs",
"http.client_ip": "",
"http.route": "/login",
"otel.name": "HTTP POST /login",
"http.scheme": "http",
"otel.kind": "server",
"request_id": "96888033-a15a-49e1-a594-276a55c467a5",
"user_id": "ddf8994f-d522-4659-8d02-c1d479057be6",
"http.method": "POST",
"elapsed_milliseconds": 857,
"username": "admin",
"http.flavor": "1.1",
"http.host": ":8000",
"http.target": "/login"
}
{
"msg": "[HTTP REQUEST - END]",
"time": "2023-12-26T20:07:31.98763833Z",
"target": "tracing_actix_web::root_span_builder",
"line": 41,
"file": "/home/owner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-actix-web-0.7.6/src/root_span_builder.rs",
"http.client_ip": "",
"http.route": "/login",
"otel.name": "HTTP POST /login",
"http.scheme": "http",
"otel.kind": "server",
"request_id": "96888033-a15a-49e1-a594-276a55c467a5",
"otel.status_code": "OK",
"http.method": "POST",
"http.status_code": 303,
"elapsed_milliseconds": 859,
"http.flavor": "1.1",
"http.host": ":8000",
"http.target": "/login"
}
{
"msg": "[HTTP REQUEST - START]",
"time": "2023-12-26T20:07:32.010586174Z",
"target": "tracing_actix_web::root_span_builder",
"line": 41,
"file": "/home/owner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-actix-web-0.7.6/src/root_span_builder.rs",
"http.flavor": "1.1",
"http.host": ":8000",
"http.route": "/admin/dashboard",
"http.method": "GET",
"otel.kind": "server",
"http.scheme": "http",
"http.target": "/admin/dashboard",
"request_id": "4e95372c-bcbb-4510-a35a-23c2a9b969af",
"http.client_ip": "",
"otel.name": "HTTP GET /admin/dashboard"
}
{
"msg": "[HTTP REQUEST - EVENT] Error encountered while processing the incoming HTTP request: The user has not logged in",
"level": 50,
"time": "2023-12-26T20:07:32.010958773Z",
"target": "tracing_actix_web::middleware",
"line": 258,
"file": "/home/owner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-actix-web-0.7.6/src/middleware.rs",
"http.flavor": "1.1",
"http.host": ":8000",
"http.method": "GET",
"exception.details": "The user has not logged in",
"exception.message": "The user has not logged in",
"otel.kind": "server",
"http.client_ip": "",
"otel.name": "HTTP GET /admin/dashboard",
"http.route": "/admin/dashboard",
"http.scheme": "http",
"otel.status_code": "ERROR",
"http.target": "/admin/dashboard",
"request_id": "4e95372c-bcbb-4510-a35a-23c2a9b969af",
"http.status_code": 303
}
{
"msg": "[HTTP REQUEST - END]",
"time": "2023-12-26T20:07:32.011172073Z",
"target": "tracing_actix_web::root_span_builder",
"line": 41,
"file": "/home/owner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-actix-web-0.7.6/src/root_span_builder.rs",
"http.flavor": "1.1",
"http.host": ":8000",
"http.method": "GET",
"exception.details": "The user has not logged in",
"exception.message": "The user has not logged in",
"otel.kind": "server",
"elapsed_milliseconds": 0,
"http.client_ip": "",
"otel.name": "HTTP GET /admin/dashboard",
"http.route": "/admin/dashboard",
"http.scheme": "http",
"otel.status_code": "ERROR",
"http.target": "/admin/dashboard",
"request_id": "4e95372c-bcbb-4510-a35a-23c2a9b969af",
"http.status_code": 303
}
{
"msg": "[HTTP REQUEST - START]",
"time": "2023-12-26T20:07:32.037893708Z",
"target": "tracing_actix_web::root_span_builder",
"line": 41,
"file": "/home/owner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-actix-web-0.7.6/src/root_span_builder.rs",
"http.route": "/login",
"request_id": "c0a23fa0-c028-431a-aa63-618641bd38df",
"http.target": "/login",
"http.client_ip": "",
"http.flavor": "1.1",
"http.scheme": "http",
"otel.kind": "server",
"http.method": "GET",
"otel.name": "HTTP GET /login",
"http.host": ":8000"
}
{
"msg": "[HTTP REQUEST - END]",
"time": "2023-12-26T20:07:32.038328407Z",
"target": "tracing_actix_web::root_span_builder",
"line": 41,
"file": "/home/owner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-actix-web-0.7.6/src/root_span_builder.rs",
"http.route": "/login",
"otel.status_code": "OK",
"request_id": "c0a23fa0-c028-431a-aa63-618641bd38df",
"http.target": "/login",
"http.client_ip": "",
"http.flavor": "1.1",
"http.scheme": "http",
"otel.kind": "server",
"http.status_code": 200,
"elapsed_milliseconds": 0,
"otel.name": "HTTP GET /login",
"http.host": ":8000"
}
{
"msg": "SIGINT received; starting forced shutdown",
"time": "2023-12-26T20:07:34.563949064Z",
"target": "actix_server::server",
"line": 319,
"file": "/home/owner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/actix-server-2.3.0/src/server.rs"
}
{
"msg": "accept thread stopped",
"time": "2023-12-26T20:07:34.564309664Z",
"target": "actix_server::accept",
"line": 143,
"file": "/home/owner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/actix-server-2.3.0/src/accept.rs"
}
{
"msg": "shutting down idle worker",
"time": "2023-12-26T20:07:34.564429363Z",
"target": "actix_server::worker",
"line": 595,
"file": "/home/owner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/actix-server-2.3.0/src/worker.rs"
}
{
"msg": "shutting down idle worker",
"time": "2023-12-26T20:07:34.564502963Z",
"target": "actix_server::worker",
"line": 595,
"file": "/home/owner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/actix-server-2.3.0/src/worker.rs"
}
{
"msg": "shutting down idle worker",
"time": "2023-12-26T20:07:34.564562663Z",
"target": "actix_server::worker",
"line": 595,
"file": "/home/owner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/actix-server-2.3.0/src/worker.rs"
}
{
"msg": "force shutdown worker, closing 1 connections",
"time": "2023-12-26T20:07:34.564389163Z",
"target": "actix_server::worker",
"line": 608,
"file": "/home/owner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/actix-server-2.3.0/src/worker.rs"
}
{
"msg": "shutting down idle worker",
"time": "2023-12-26T20:07:34.564630463Z",
"target": "actix_server::worker",
"line": 595,
"file": "/home/owner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/actix-server-2.3.0/src/worker.rs"
}
{
"msg": "shutting down idle worker",
"time": "2023-12-26T20:07:34.564637463Z",
"target": "actix_server::worker",
"line": 595,
"file": "/home/owner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/actix-server-2.3.0/src/worker.rs"
}
{
"msg": "shutting down idle worker",
"time": "2023-12-26T20:07:34.564656263Z",
"target": "actix_server::worker",
"line": 595,
"file": "/home/owner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/actix-server-2.3.0/src/worker.rs"
}
{
"msg": "shutting down idle worker",
"time": "2023-12-26T20:07:34.565055662Z",
"target": "actix_server::worker",
"line": 595,
"file": "/home/owner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/actix-server-2.3.0/src/worker.rs"
}
{
"msg": "API has exited",
"time": "2023-12-26T20:07:34.866856328Z",
"target": "zero2prod",
"line": 29,
"file": "src/main.rs"
}
```

I'd really appreciate any help with tracking this problem down. Conversely, if this is a problem on my end such as misconfiguration or something of this sort I'm really sorry for using an issue incorrectly.

Reproduce the POST /login followed by GET /admin/dashboard flow and compare the session logs. Start with src/sessionState.rs, then trace the login path in src/routes/login/post.rs and credential handling in src/authentication/password.rs. Done means a valid seeded login retains its session and loads the dashboard.

Written by the indexing model from the issue text.