add an OpenAI example

with-openai/.env.sample

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+STEPZEN_OPENAI_API_KEY=sk-s6-yourkey-yourkey-yourkey-H3

with-openai/.gitignore

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+node_modules
+yarn.lock
+package-lock.json
+.env
+!config.yaml

with-openai/README.md

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+# StepZen Example: `with-openai`
+
+## Introduction
+
+This project shows how to create a GraphQL API connected for OpenAI using StepZen. We will use the `@rest` directive to generate our GraphQL schema. You can refer to the documentation [here](https://www.openai.com/en/api/documentation)
+
+## Getting Started
+
+You'll need to create a [StepZen account](https://stepzen.com/request-invite) first. Once you've got that set up, [git clone](https://www.atlassian.com/git/tutorials/setting-up-a-repository/git-clone) this repository onto your machine and open the working directory:
+
+```bash
+git clone https://github.com/stepzen-dev/examples.git
+cd examples/with-openai
+```
+
+You also need an OpenAI account and an API key. You can get one from the [OpenAPI web site](https://beta.openai.com/account/api-keys). Once you have it, please create a `.env` file and save it there:
+
+```bash
+echo "STEPZEN_OPENAI_API_KEY=sk-s6-yourkey-yourkey-yourkey-H3" > .env
+```
+
+## Run StepZen
+
+Open your terminal and [install the StepZen CLI](https://stepzen.com/docs/quick-start):
+
+```bash
+npm install -g stepzen
+```
+
+You need to login here using the command:
+
+```bash
+stepzen login
+```
+
+After you've installed the CLI and logged in, run:
+
+```bash
+stepzen start
+```
+
+A proxy of the GraphiQL playground becomes available at `http://localhost/5001` (in example `http://localhost:5001/api/with-openai`), which you can use to explore the GraphQL API. Also, the endpoint at which your GraphQL API is deployed gets logged in the terminal. You can query your GraphQL API from any application, browser, or IDE by providing the API Key linked to your account.
+
+## Learn More
+
+You can learn more in the [StepZen documentation for REST](https://stepzen.com/docs/connecting-backends/how-to-connect-a-rest-service). Questions? Head over to [Discord](https://discord.gg/9k2VdPn2FR) or [GitHub Discussions](https://github.com/stepzen-dev/examples/discussions) to ask questions.

with-openai/config.yaml

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+configurationset:
+ - configuration:
+ name: openai_config
+ openai_auth: Bearer STEPZEN_OPENAI_API_KEY

with-openai/index.graphql

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+schema @sdl(files: ["openai/image-generations.graphql"]) {
+ query: Query
+}

with-openai/openai/image-generations.graphql

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+type ImageData {
+ url: String
+}
+
+type GenerationResult {
+ created: Int
+ data: [ImageData]
+}
+
+type Query {
+ generations(prompt: String!, n: Int, size: String): GenerationResult
+ @rest(
+ method: POST
+ endpoint: "https://api.openai.com/v1/images/generations"
+ headers: [{ name: "Authorization", value: "$openai_auth;" }]
+ configuration: "openai_config"
+ )
+}

with-openai/stepzen.config.json

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+{
+ "endpoint": "api/with-openai"
+}