create and list user examples

entity/src/lib.rs

@@ -1 +1,5 @@
-pub mod user;
+pub mod user;
+pub mod permission;
+
+pub use user::Entity as User;
+pub use permission::Entity as Permission;

entity/src/user.rs

@@ -9,7 +9,7 @@ pub struct Model {
     pub id: i32,
     pub username: String,
     #[sea_orm(column_type = "Text")]
-    pub description: String,
+    pub description: Option<String>,
 }
 
 #[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]