Add gothic example code to internal/auth

internal/server/routes.go

@@ -1,6 +1,7 @@
 package server
 
 import (
+	"gothtest/internal/auth"
 	"encoding/json"
 	"log"
   "fmt"
@@ -54,7 +55,7 @@ func (s *Server) getAuthCallbackFunc(w http.ResponseWriter, r *http.Request) {
   provider := chi.URLParam(r, "provider")
   r = r.WithContext(context.WithValue(context.Background(), "provider", provider))
 
-  user, err := gothic.CompleteUserAuth(w, r)
+  user, err := auth.CompleteAuthFlow(w, r)
   if err != nil {
     fmt.Fprintln(w, err)
     return