Added CLI and more functionality

cmd/login

@@ -0,0 +1,62 @@
+package cmd
+
+import "github.com/spf13/cobra"
+
+var (
+	host string
+	port int
+	redirectUri  = []string{""}
+	state        = ""
+	responseType = "code"
+	scope        = []string{"email", "profile", "openid"}
+	client oauth.Client
+)
+
+var loginCmd = &cobra.Command{
+	Use: "login",
+	Short: "Start the login flow"
+	Run: func(cmd *cobra.Command, args []string) {
+		oidcProvider := oidc.NewOIDCProvider()
+		var authorizationUrl = util.BuildAuthorizationUrl(
+			oidcProvider.GetAuthorizeUrl(),
+			client.Id,
+			redirectUri,
+			util.RandomString(20),
+			responseType,
+			[]string{"email", "profile", "openid"},
+		)
+
+		// print the authorization URL for the user to log in
+		fmt.Printf("Login with identity provider: %s\n", authorizationUrl)
+
+		// start a HTTP server to listen for callback responses
+		fmt.Printf("Waiting for response from OIDC provider...\n")
+		err := server.Start(host, port)
+		if errors.Is(err, http.ErrServerClosed) {
+			fmt.Printf("server closed\n")
+		} else if err != nil {
+			fmt.Printf("error starting server: %s\n", err)
+			os.Exit(1)
+		}
+
+		// extract code from response and exchange for bearer token
+
+		// extract ID token and save user info
+
+		// create a new identity with Ory Kratos
+
+		// use ID token/user info to get access token from Ory Hydra
+	},
+}
+
+
+func init(){
+	loginCmd.Flags().StringVar(&client.Id, "client.id", "", "set the client ID")
+	loginCmd.Flags().StringVar(&redirectUri, "redirect-uri", "", "set the redirect URI")
+	loginCmd.Flags().StringVar(&responseType, "response-type", "code", "set the response-type")
+	loginCmd.Flags().StringSliceVar(&scope, "scope", []string{"openid", "email"}, "set the scopes")
+	loginCmd.Flags().String(&state, "state", util.RandomString(), "set the state")
+	loginCmd.Flags().StringVar(host, "host", "127.0.0.1", "set the listening host")
+	loginCmd.Flags().IntVar(&port, "port", 3333, "set the listening port")
+	rootCmd.AddCommand(loginCmd)
+}