Parameter only for POST

[DenisFerrero]

I have a schema that I would like to use for both POST and PUT methods but a target parameter is allowed only for the POST request.

To make it clear let's imagine that there is a possibility to create and update a user.
At the POST it's required the name and the inviteCode, then for the PUT just the name and don't allow to edit the inviteCode anymore

components:
  schemas:
    user:
      type: object
      properties:
        name:
          type: string
        inviteCode:
          type: string
paths:
  "/user":
    post:
      requestBody:
        content:
          application/json:
            schema:
              "$ref": "#/components/schemas/user"
  "/user/{id}":
    put:
      parameters:
      - name: id
        in: path
        required: true
        schema:
          type: string
      requestBody:
        content:
          application/json:
            schema:
              "$ref": "#/components/schemas/user"

Is there a way to do it by just adding a parameter to the inviteCode?