Whats wrong with my stored procedure

[Akash Vachhani]

DELIMITER $$
CREATE DEFINER=`root`@`ipaddressgoeshere PROCEDURE `sp_createUser`(
IN p_fname VARCHAR(20),
IN p_lname VARCHAR(20),
IN p_username VARCHAR(20),
IN p_password VARCHAR(20),
IN p_pic VARCHAR(120)
)
BEGIN
if ( select exists (select 1 from tbl_user where user_username = p_username) ) THEN

select 'Username Exists !!';

ELSE

insert into tbl_user
(
user_fname,
user_lname,
user_username,
user_password,
user_pic
)
values
(
p_fname,
p_lname,
p_username,
p_password,
p_pic
);

END IF;
END$$
DELIMITER ;



The error i get on workbench is please use SQL statements. std::execution