Method pinChat

api/server/models/User.ts:1426–1439

({ userId, chatId })

  }

  public static async pinChat({ userId, chatId }) {
    if (!userId || !chatId) {
      throw new Error('Bad data.');
    }

    await this.updateOne(
      { _id: userId },
      {
        $push: {
          pinnedChatIds: chatId,
        },
      },
    );
  }

  public static async unpinChat({ userId, chatId }) {
    if (!userId || !chatId) {