chore: added delete function

packages/lib/server-only/user/delete-user-and-data.ts

@@ -0,0 +1,41 @@
+import { prisma } from '@documenso/prisma';
+
+export const deleteUserAndItsData = async (name: string) => {
+  const user = await prisma.user.findFirst({
+    where: {
+      name: {
+        contains: name,
+      },
+    },
+  });
+
+  if (!user) {
+    throw new Error(`User with name ${name} not found`);
+  }
+
+  const document = await prisma.document.findMany({
+    where: {
+      userId: user.id,
+    },
+    select: {
+      documentData: {
+        select: {
+          data: true,
+        },
+      },
+    },
+  });
+
+  return prisma.$transaction([
+    prisma.user.delete({
+      where: {
+        id: user.id,
+      },
+    }),
+    prisma.documentData.deleteMany({
+      where: {
+        data: document[0]?.documentData.data,
+      },
+    }),
+  ]);
+};