No! This is a very common scamming technique. We will NEVER ask you to enter your accountID or password anywhere, except for the Echo of Soul game client and the Papaya Play website.
Any outside website or user who claims to offer free rewards, game cash, free reinforcements, or other such items is lying to you.
If you're uncertain, you can always submit a support request, or check with our Game Masters and Community Representatives on our Discord channel.