text: CREATE TABLE IF NOT EXISTS topics (
          id                                      SERIAL PRIMARY KEY NOT NULL,
          user_id                                 VARCHAR NOT NULL REFERENCES users(id) ON DELETE CASCADE,
          title                                   VARCHAR NOT NULL,
          content                                 VARCHAR NOT NULL, 
          node                                    VARCHAR NOT NULL,
          created_at                              TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT NOW(),
          updated_at                              TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT NOW() 
  );
  
  CREATE INDEX ON topics (user_id);
  CREATE INDEX ON topics (title);
  CREATE INDEX ON topics (node);