Nexus - Prisma integration

[deltaerp]

Hi,
I am somehow confused. The docs say that the nexus-prisma-plugin will:

Workflow integration
Nexus build and dev workflows are enhanced to run your Prisma generators.

Example
Given a Prisma schema (left), you will be able to project these Prisma models onto your API (Nexus Schema) and expose operations against them (middle) resulting in the GraphQL Schema (right).

Prisma Schema: I understand this can be done manually or automatically by prisma - introspection
generator prisma_client {
provider = "prisma-client-js"
}
// prisma model
model User {
id String @id @default(cuid())
email String @unique
birthDate DateTime
}

model Post {
id String @id @default(cuid())
author User[]
}

Nexus Schema: - THIS IS MY QUESTION: Will this be created automatically with nexus dev / build OR this has to be created manually? Could you please provide guidelines on this

import { schema } from 'nexus'

schema.queryType({
definition(t) {
t.crud.user()
t.crud.users({
ordering: true,
})
t.crud.post()
t.crud.posts({
filtering: true,
})
},
})
etc, etc.

Graphql Schema: This is created automatically - OR SDL - better said.

type User {
birthDate: DateTime!
email: String!
id: ID!
posts(after: String, before: String, first: Int, last: Int): [Post!]!
}

I did something but it is not creating the Nexus - schema.
Steps:

1. Install nexus
2. Install nexus-prisma-login
3. npx prisma init
4. provided credentials for postgress in .env file
5. npx prisma introspection - this works fine
6. npx nexus dev -
   -It does not create the Nexus Schema neither the SDL / Graphql Schema

What am I doing wrong? or Definitely I MUST create the Nexus Schema manually.

Thanks in advance,
JA