Resend password chosen by WP administrator? [duplicate]

WordPress cannot resend the existing password, because it does not know the existing password.

Passwords are not stored as plain text, they are stored using a one-way hash. They cannot be decrypted and resent. They can be reset to something entirely new, and you can send that, but you can’t send what you don’t know in advance.

Passwords should not be stored as plain text, for security reasons.