如何为Golang格式化MySql CREATE USER语句

I am trying to create a MySql user from a Golang program but I am unable to find the correct formatting of the SQL string:

    _, err := db.Query("CREATE USER ?@`%` IDENTIFIED BY ?",username)

I have tried many variations: enclosing the ? in backticks, single quotes, parenthesis, but nothing works.

I either get sql: expected 0 arguments, got 1 (or 2 if I add one or two parameters), or I get

Error 1064: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '?@`%` IDENTIFIED BY ?' at line 1

I have found similar questions but none is using the CREATE USER, and none of the solutions found there worked for me. Thanks

I have found a workaround:

    password := "aaargh!"
    s := "CREATE USER '" + username + "'@`%` IDENTIFIED BY '" + password + "'"

This is working in my test.