feat: updated identity providers in admin panel

backend/internal/interfaces/handlers/auth_handler.go

@@ -141,6 +141,30 @@ func (h *AuthHandler) CreateProvider(w http.ResponseWriter, r *http.Request) {
 	json.NewEncoder(w).Encode(provider)
 }
 
+// UpdateProvider updates an existing OAuth/OIDC provider configuration.
+func (h *AuthHandler) UpdateProvider(w http.ResponseWriter, r *http.Request) {
+	providerID, err := bson.ObjectIDFromHex(mux.Vars(r)["providerId"])
+	if err != nil {
+		http.Error(w, "Invalid provider ID", http.StatusBadRequest)
+		return
+	}
+
+	var req dto.UpdateAuthProviderRequest
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		http.Error(w, "Invalid request body", http.StatusBadRequest)
+		return
+	}
+
+	provider, err := h.authService.UpdateProvider(r.Context(), providerID, &req)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(provider)
+}
+
 // StartProviderLogin redirects the browser to the selected provider.
 func (h *AuthHandler) StartProviderLogin(w http.ResponseWriter, r *http.Request) {
 	providerID, err := bson.ObjectIDFromHex(mux.Vars(r)["providerId"])