Support new option "github-user" (#421)

* feat(github): support new option "github-user"

* feat(github): rename github-user to github-users

* feat(github): update docs for github-users option

* feat(github): remove unneeded code

* feat(github): remove logging

* feat(github-user): use github-user as flagset options

* feat(github-user): remove optionns.go

* feat(github-user): add github-user flagset

* feat(github): improve readability in the docs

* feat(github-user): refactored SetUsers method

* Update flag description

Co-authored-by: Joel Speed <Joel.speed@hotmail.co.uk>

pkg/apis/options/options.go

@@ -48,6 +48,7 @@ type Options struct {
 	GitHubTeam               string   `flag:"github-team" cfg:"github_team"`
 	GitHubRepo               string   `flag:"github-repo" cfg:"github_repo"`
 	GitHubToken              string   `flag:"github-token" cfg:"github_token"`
+	GitHubUsers              []string `flag:"github-user" cfg:"github_users"`
 	GitLabGroup              string   `flag:"gitlab-group" cfg:"gitlab_group"`
 	GoogleGroups             []string `flag:"google-group" cfg:"google_group"`
 	GoogleAdminEmail         string   `flag:"google-admin-email" cfg:"google_admin_email"`
@@ -228,6 +229,7 @@ func NewFlagSet() *pflag.FlagSet {
 	flagSet.String("github-team", "", "restrict logins to members of this team")
 	flagSet.String("github-repo", "", "restrict logins to collaborators of this repository")
 	flagSet.String("github-token", "", "the token to use when verifying repository collaborators (must have push access to the repository)")
+	flagSet.StringSlice("github-user", []string{}, "allow users with these usernames to login even if they do not belong to the specified org and team or collaborators (may be given multiple times)")
 	flagSet.String("gitlab-group", "", "restrict logins to members of this group")
 	flagSet.StringSlice("google-group", []string{}, "restrict logins to members of this google group (may be given multiple times).")
 	flagSet.String("google-admin-email", "", "the google admin to impersonate for api calls")

pkg/validation/options.go

@@ -309,6 +309,7 @@ func parseProviderInfo(o *options.Options, msgs []string) []string {
 	case *providers.GitHubProvider:
 		p.SetOrgTeam(o.GitHubOrg, o.GitHubTeam)
 		p.SetRepo(o.GitHubRepo, o.GitHubToken)
+		p.SetUsers(o.GitHubUsers)
 	case *providers.KeycloakProvider:
 		p.SetGroup(o.KeycloakGroup)
 	case *providers.GoogleProvider: