Enable other aws authentication methods

[CDingerdis]

Currently in the aws provider inauth.tf the only way to authenticate is via the access_key and secret_key. Now when you use another authentication method it will not work.

Deleting the whole provider works but is not the preferred way.

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Edit:

Even with the access_key and secret_key filled in i don't get it working, looks like the aws provider in auth.tf overwrites the one in my project.

[xe-nvdk]

Hello. Thank you for opening this issue. I will check what's going here and see what other kind of authentication we can add to the module. Stay tunned.

Ignacio