Verifies whether a password reset token is valid, unexpired, and eligible to be used for updating the user’s password. This endpoint is typically called when the user opens the reset password URL before showing the “Create New Password” form.If the token is valid, the client can allow the user to continue to the password update step. If the token is invalid, expired, revoked, or already used, the API returns an error response and the user should request a new password reset link.