authenticate_user.rb

# app/services/authenticate_user.rb

class AuthenticateUser
  def initialize(email, password)
    @email = email
    @password = password
  end

  def call
    JsonWebToken.encode(user_id: user.id) if user
  end

  private

  attr_accessor :email, :password

  def user
    user = User.find_by(email: email)
    # return user if user && user.authenticate(password)
    return user if user&.authenticate(@password)

    errors.add(:user_authentication, 'invalid credentials')
    nil
  end
end