Add setApiKey method

[badasswp]

This PR resolves this issue.

Description / Background Context

At the moment, it is difficult to effectively mock our OpenAi class in unit tests because we are currently forced to pass in the API key as an argument during instantiation.

This PR creates a new setApiKey method that enables us do this anytime so that we are not restricted to the constructor. In this way, we can create and pass our objects via dependency injection like so:

interface AiClient
{
    public function chat($payload): void;
}

public function getAiClient(AiClient $aiClient)
{
    return $aiClient;
}

public function getOpenAiClient()
{
    $this->getAiClient(new OpenAi())->setApiKey($keys);
}

In this way, we should be able to easily mock our OpenAi class for use in unit tests like so:

public function testOpenAiDoesSomething()
{
    $openAiMock = Mockery::mock(OpenAi::class)->makePartial();
    // write your other test logic....
}

Testing Instructions

1. Pull PR to local.
2. Run composer install.
3. Run unit tests: ./vendor/bin/pest --group=api-keys
4. Tests should pass successfully like so:

Closes: #156

[badasswp]

Hi @orhanerday @pascalbajorat If any of you have got some time later today, could you pls review this PR. Thanks.

[orhanerday]

Hey @badasswp,
I’m pretty busy these days with my role upgrade at the company. I’ll check it as soon as I can, but I can’t give an exact time. Thanks for your patience!

[badasswp]

Thanks @orhanerday. I appreciate 🙏