HTTP Method is not allowed

[Kurt Weston]

I have a API gateway which maps to Cloud Run services. Nothing fancy or complex. Postman is attempting to POST a json payload to the API gateway endpoint suffixed with "/api/user". However, I keep getting the below message:

{
    "message": "The current request is matched to the defined url template \"/api/user\" but its http method is not allowed",
    "code": 405

}

My yaml sample is:

"/api/user":

    post:

        summary: Create a user

        operationId: create_user

        x-google-backend:

           address: https://{service-path}/api/user

        responses:

            "200":

                description: A successful response

                    schema:

                    type: string

[Kurt Weston]

Weirdly, in my Postman, I needed to explicitly define https in the url and it started working. I presume the POST HTTP Method has some additional security measures in place.