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Try this OpenAPI specification
GET
openapi: 3.0.0
info:
  title: Users API
  version: 1.0.0
paths:
  /v1/user:
    get:
      responses:
        '200':
          description: A user object
          content:
            application/json:
              schema:
                type: object
                properties:
                  id:
                    type: string
                  username:
                    type: string
                  email:
                    type: string
                  country:
                    type: string
                  address:
                    type: object
                    properties:
                      street:
                        type: string
                      city:
                        type: string
                      state:
                        type: string
                      zip:
                        type: string
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The Smarter Way to Mock APIs

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