No more nullable uses field(it was signed) so option was redundant

server/migrations/2020-02-04-083657_invites/up.sql

@@ -2,6 +2,6 @@
 CREATE TABLE IF NOT EXISTS `invites` (
 	`id` bigint UNSIGNED NOT NULL,
 	`expires` bigint UNSIGNED NOT NULL,
-	`uses` integer, 
+	`uses` integer NOT NULL, 
 	PRIMARY KEY( `id` )
 );

server/src/models.rs

@@ -4,7 +4,7 @@ use crate::schema::{invites, users};
 pub struct Invite {
     pub id: u64,
     pub expires: u64,
-    pub uses: Option<i32>,
+    pub uses: i32,
 }
 
 #[derive(Serialize, Deserialize, Queryable, Insertable, Debug)]

server/src/schema.rs

@@ -2,14 +2,7 @@ table! {
     invites (id) {
         id -> Unsigned<Bigint>,
         expires -> Unsigned<Bigint>,
-        uses -> Nullable<Integer>,
-    }
-}
-
-table! {
-    new_users (token) {
-        token -> Varchar,
-        invite_id -> Unsigned<Bigint>,
+        uses -> Integer,
     }
 }
 
@@ -24,6 +17,5 @@ table! {
 
 allow_tables_to_appear_in_same_query!(
     invites,
-    new_users,
     users,
 );