Initial Auth Impl + More Caching (#647)

* Port redis to staging

* redis cache on staging

* add back legacy auth callback

* Begin work on new auth flows

* Finish all auth flows

* Finish base session authentication

* run prep + fix clippy

* make compilation work

src/models/sessions.rs

@@ -0,0 +1,29 @@
+use super::ids::Base62Id;
+use crate::models::users::UserId;
+use chrono::{DateTime, Utc};
+use serde::{Deserialize, Serialize};
+
+#[derive(Copy, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(from = "Base62Id")]
+#[serde(into = "Base62Id")]
+pub struct SessionId(pub u64);
+
+#[derive(Serialize, Deserialize, Clone)]
+pub struct Session {
+    pub id: SessionId,
+    pub session: String,
+    pub user_id: UserId,
+
+    pub created: DateTime<Utc>,
+    pub last_login: DateTime<Utc>,
+    pub expires: DateTime<Utc>,
+    pub refresh_expires: DateTime<Utc>,
+
+    pub os: Option<String>,
+    pub platform: Option<String>,
+    pub user_agent: String,
+
+    pub city: Option<String>,
+    pub country: Option<String>,
+    pub ip: String,
+}