Epic: Add Client Credentials Grant sample

[jgrandja]

This epic groups all the issues that will deliver a Spring Boot sample realizing the client_credentials grant flow.

Please review the Client Credentials Grant to gain an understanding of the flow.

[dfcoffin]

Is this a Spring Boot or Authorization Server sample?

[andifalk]

According to https://tools.ietf.org/html/rfc6749#section-2.3.1 authentication can be done via

• HTTP Basic authentication scheme (MUST be supported)
• including the client credentials (client_id, client_secret) in the request-body (MAY be supported)

What is the plan here? Will just option 1 be implemented? Supporting both options would be more complicated as a simple basic auth filter will not work here.

[jgrandja]

@andifalk We'll start with HTTP Basic but we'll definitely need a strategy that will allow for other authentication mechanisms. Let's start simple and build from there.

[lspil]

@jgrandja If I can help for this implementation let me know :)
If not this one, I'm glad to help with implementing any of the tasks.

[jgrandja]

Thanks for reaching out @lspil ! Would you be interested in trying #5?