Implement users in API

src/models/users.rs

@@ -0,0 +1,19 @@
+use super::ids::Base62Id;
+use serde::{Deserialize, Serialize};
+
+#[derive(Copy, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(from = "Base62Id")]
+#[serde(into = "Base62Id")]
+pub struct UserId(pub u64);
+
+#[derive(Serialize, Deserialize)]
+pub struct User {
+    pub id: UserId,
+    pub github_id: UserId,
+    pub username: String,
+    pub name: String,
+    pub email: Option<String>,
+    pub avatar_url: String,
+    pub bio: String,
+    pub created: chrono::DateTime<chrono::Utc>,
+}