server side and user client side completed for registration

server/api/v1/admin/auth/invitation/index.post.ts

@@ -0,0 +1,27 @@
+import prisma from "~/server/internal/db/database";
+
+export default defineEventHandler(async (h3) => {
+  const user = await h3.context.session.getAdminUser(h3);
+  if (!user) throw createError({ statusCode: 403 });
+
+  const body = await readBody(h3);
+  const isAdmin = body.isAdmin;
+  const username = body.username;
+  const email = body.email;
+
+  if (isAdmin !== undefined && typeof isAdmin !== "boolean")
+    throw createError({
+      statusCode: 400,
+      statusMessage: "isAdmin must be a boolean",
+    });
+
+  const invitation = await prisma.invitation.create({
+    data: {
+      isAdmin: isAdmin,
+      username: username,
+      email: email,
+    },
+  });
+
+  return invitation;
+});