Support FileMaker Cloud

[heebinho]

Hi Nate,

have you ever thought about supporting FileMaker Cloud? The process to obtain a token would be slightly different:

1. The first step would be to get the "AWS Cognito FileMaker Cloud UserPool id"
   GET https://www.ifmcloud.com/endpoint/userpool/2.2.0.my.claris.com.json

2. The second step would be to get the token as showed in this gist

3. Then the authorization header would have to be set like this:
   'Authorization FMID eyJ...'
   instead of the base 64 encoded username:password
   // special non-token auth to list databases requestMessage.Headers.Authorization = new AuthenticationHeaderValue("basic", Convert.ToBase64String( Encoding.UTF8.GetBytes($"{_userName}:{_password}")

Awesome project, already learned a lot.

Greetings from Zurich

[heebinho]

I got a first draft - see commit
I guess this won't make up for a pull request, but it's a working version to show the AWS cognito authorization flow.

[fuzzzerd]

That's a very interesting idea. I'm interested to learn more about how it could work and figure out a way to get it working.

Couple of initial thoughts.

1. We don't want to add the aws packages to the base package
2. We need to abstract authentication such that another package can handle the aws part and adjust the main httpclient.
3. I'm not opposed to adding more targets, but I'd be more interested in net6.0, or maybe net48 than net47.

[heebinho]

Glad to hear and I totally agree with your first two points.
As for three, I'm with you - net6.0 support would be great. (net47 was just for testing purposes on an older windows server)

[fuzzzerd]

I do not have access to FileMaker Cloud to test against, and I've got some specific guidelines on what would be necessary for me to accept a PR for this functionality, but if you're game I'd be happy to work with you on getting something working and eventually merged.

[fuzzzerd]

This has been implemented in #213.

[fuzzzerd]

This has been released to Nuget in v5!

[heebinho]

Thank you Nate!!