Enhance the user experience by enabling authentication to Netbird using Single Sign-On (SSO) with any Identity Provider (IDP) provider. Current client offers this capability through the Device Authorization Flow, however, is not widely supported by many IDPs, and even some that do support it do not provide a complete verification URL.
To address these challenges, this pull request enable Authorization Code Flow with Proof Key for Code Exchange (PKCE) for client logins, which is a more widely adopted and secure approach to facilitate SSO with various IDP providers.
Some IDP requires different scope requests and
issue access tokens for different purposes
This change allow for remote configurable scopes
and the use of ID token
Code cleaning in the config.go of the client. This change keep the
logic in original state. The name of the exported function was not
covered well the internal workflow. Without read the comment was not
understandable what is the difference between the GetConfig and
ReadConfig. By the way both of them doing write operation.