Delete duplicate members migration (#33)

* add migration to delete duplicates that currently exist in the db

* added a name attribute for consistency

---------

Co-authored-by: Aster Fialla <asterfialla@gmail.com>

database/migrations/1772825438973-delete-duplicates.ts

@@ -0,0 +1,17 @@
+import { MigrationInterface, QueryRunner } from "typeorm";
+
+export class DeleteDuplicates1772825438973 implements MigrationInterface {
+    name= "DeleteDuplicates1772825438973"
+    public async up(queryRunner: QueryRunner): Promise<void> {
+        await queryRunner.query(`DELETE
+                                 FROM "Member" a USING "Member" b
+                                 WHERE a.id
+                                     > b.id
+                                   AND a.name = b.name
+                                   AND a.userid = b.userid;`)
+    }
+
+    public async down(queryRunner: QueryRunner): Promise<void> {
+    }
+
+}