Added user login, logout and creation functionality

Also minor changes to ticketing and AppState

backend/src/env.rs

@@ -0,0 +1,16 @@
+#[derive(Debug, Clone)]
+pub struct Env {
+    pub db_url: String,
+    pub token_secret: String,
+}
+
+impl Env {
+    pub fn load() -> Env {
+        let db_url = std::env::var("DATABASE_URL").expect("DATABASE_URL must be set");
+        let token_secret = std::env::var("TOKEN_SECRET").expect("TOKEN_SECRET must be set");
+        Env {
+            db_url,
+            token_secret,
+        }
+    }
+}