Add game join log

Author: Brutus5000

migrations/V138__game_join_log.sql

@@ -0,0 +1,10 @@
+create table game_join_log
+(
+    id          BIGINT auto_increment
+        primary key,
+    player_id   mediumint unsigned     not null,
+    game_id     int unsigned           not null,
+    create_time datetime default now() not null,
+    constraint game_join_log_login_id_fk
+        foreign key (player_id) references login (id)
+);