First working API.

Simple auth by creating sessions and storing in db

src/database.rs

@@ -0,0 +1,35 @@
+use crate::config;
+use crate::error::AppError;
+use axum::async_trait;
+use deadpool_diesel::postgres::BuildError;
+use deadpool_diesel::Status;
+use diesel_async::pooled_connection::deadpool::{Object, Pool};
+use diesel_async::pooled_connection::AsyncDieselConnectionManager;
+use diesel_async::AsyncPgConnection;
+
+pub type PgPool = Pool<AsyncPgConnection>;
+
+#[async_trait]
+pub trait GetConnection: Clone + Send + Sync {
+    async fn get(&self) -> Result<Object<AsyncPgConnection>, AppError>;
+    fn status(&self) -> Status;
+}
+
+#[async_trait]
+impl GetConnection for PgPool {
+    async fn get(&self) -> Result<Object<AsyncPgConnection>, AppError> {
+        self.get().await.map_err(Into::into)
+    }
+    fn status(&self) -> Status {
+        self.status()
+    }
+}
+
+pub(crate) fn create_pool() -> Result<PgPool, BuildError> {
+    create_pool_from_url(config::DATABASE_URL)
+}
+
+pub(crate) fn create_pool_from_url(url: impl Into<String>) -> Result<PgPool, BuildError> {
+    let config = AsyncDieselConnectionManager::<AsyncPgConnection>::new(url);
+    Pool::builder(config).max_size(config::POOL_SIZE).build()
+}