If user inputs an invalid API key it should return the header title/detail when requesting

[brown-jason]

If you input an invalid API key ctxR will respond with:
" Please input an API_key!"

Ideally it would respond with one or both of the following messages from the header.
{
"title": "API Key Not Found",
"detail": "Please contact API admin for requesting a valid API key. Key xxxxxxxxxx not found."
}

The only time ctxR should return " Please input an API_key!" is when the user has not specified an api key at all.

[rachmaninoffpk]

I will include the detail portion of the response. That gives a sufficient amount of information.