Update to more generic db models

Also integrated entities into codebase

src/entity/prelude.rs

@@ -0,0 +1,7 @@
+//! `SeaORM` Entity, @generated by sea-orm-codegen 1.0.0
+
+pub use super::game::Entity as Game;
+pub use super::game_to_team_result::Entity as GameToTeamResult;
+pub use super::team_result::Entity as TeamResult;
+pub use super::team_result_to_user::Entity as TeamResultToUser;
+pub use super::user::Entity as User;