Had to make fields Optional if they're Nullable..

Makes sense. Gonna need another type for pre-commited User objects
though.

src/models.rs

@@ -1,16 +1,26 @@
 use chrono::{
     NaiveDateTime,
 };
+use diesel::prelude::*;
+use diesel::PgConnection;
+use serde_derive::Serialize;
 
 #[derive(Queryable, Debug)]
 pub struct User {
-    pub id: Option<i32>,
-    pub username: String,
-    pub is_active: bool,
+    pub id: i32,
+    pub username: Option<String>,
+    pub is_active: Option<bool>,
     pub created_at: Option<NaiveDateTime>,
     pub updated_at: Option<NaiveDateTime>,
 }
 
+impl User {
+    pub fn get_with_username(conn: &PgConnection, name: String) -> QueryResult<User> {
+        use crate::schema::users::dsl::{ username, users };
+        users.filter(username.eq(&name)).first::<User>(conn)
+    }
+}
+
 #[derive(Queryable)]
 pub struct Token {
     pub id: Option<i32>,