feature: support db migration and user model

.env

@@ -0,0 +1 @@
+DATABASE_URL=postgres://postgres:postgres@localhost/chat

Cargo.toml

@@ -13,7 +13,12 @@ axum = { version = "0.7.5", features = [
 ] }
 serde = { version = "1.0.198", features = ["derive"] }
 serde_yaml = "0.9.34"
-sqlx = { version = "0.7.4", features = ["postgres", "runtime-tokio-rustls"] }
+sqlx = { version = "0.7.4", features = [
+  "chrono",
+  "postgres",
+  "runtime-tokio",
+  "tls-rustls",
+] }
 thiserror = "1.0.59"
 tokio = { version = "1.37.0", features = ["rt", "rt-multi-thread", "macros"] }
 tracing = "0.1.40"

chat_server/Cargo.toml

@@ -7,11 +7,16 @@ edition = "2021"
 
 [dependencies]
 anyhow = { workspace = true }
+argon2 = { version = "0.5.3", features = ["std"] }
 axum = { workspace = true }
+chrono = { version = "0.4.38", features = ["serde"] }
 serde = { workspace = true }
 serde_yaml = { workspace = true }
 sqlx = { workspace = true }
 thiserror = { workspace = true }
 tokio = { workspace = true }
 tracing = { workspace = true }
 tracing-subscriber = { workspace = true }
+
+[dev-dependencies]
+sqlx-db-tester = "0.4.0"

chat_server/src/error.rs

@@ -0,0 +1,10 @@
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+pub enum AppError {
+    #[error("sql error: {0}")]
+    SqlxError(#[from] sqlx::Error),
+
+    #[error("password hash error: {0}")]
+    PasswordHashError(#[from] argon2::password_hash::Error),
+}