Argon2 always returns false

I create a user on the login page and hash this password with Argon2 but when I compare it, it does not match the password. The hashed password is shown in the database and I can also see the plain text. When I compare the two, it returns false. I have been trying for a day. I was using normal bcryptjs but when it did not work, I switched to argon2. I guess I was making the same mistake in both

exports.register = async (req, res) => {
  try {
    const { fullname, username, email, password } = req.body;
    const existingUser = await User.findOne({ email });
    if (existingUser)
      return res.status(400).json({ message: "User already exists!" });
    const trimmedPassword = password.trim();
    const hashedPassword = await argon2.hash(trimmedPassword);
    const newUser = new User({
      fullname,
      username,
      email,
      password: hashedPassword,
    });
    await newUser.save();
    console.log(newUser);
    res
      .status(201)
      .json({ message: "User created successfully. Welcome to InkSpace..." });
  } catch (error) {
    res.status(500).json({ message: "Error creating user", error });
  }
};
exports.login = async (req, res) => {
  try {
    const { email, password } = req.body;
    const plainPassword = password.trim();
    console.log("plain password",plainPassword);
    const user = await User.findOne({ email });
    const hashPassword = user.password;
    console.log(user);
    if (!user) {
      return res.status(400).json({ message: "Invalid email or password" });
    }
    console.log(hashPassword);
    const isMatch = await argon2.verify(hashPassword, plainPassword);
    console.log(isMatch)
    if (isMatch) {
      req.session.user = {
        userId: user._id,
        username: user.username,
      };
      console.log("Session data after login:", req.session.user);
      return res.status(200).json({ message: "Login successful" });
    } else {
      console.log("did not match")
      return res.status(400).json({ message: "Invalid email or password" });
    }
  } catch (error) {
    console.log("verify argon2 ", error);
    res.status(500).json({ message: "Error logging in", error });
  }
};