user creation and invites

prisma/migrations/20250624133959_add_username/migration.sql

@@ -0,0 +1,8 @@
+/*
+  Warnings:
+
+  - Made the column `username` on table `User` required. This step will fail if there are existing NULL values in that column.
+
+*/
+-- AlterTable
+ALTER TABLE "User" ALTER COLUMN "username" SET NOT NULL;