I am new to javascript and nodejs and I have a question

I have a code that I'm working on in a simple API but I'm having a hard time understanding why this is happening

app.get('/api/list_all', (req, res) => {
    get_info(`SELECT * FROM users;`, function(result){
        res.json(result);
    });
});

I have this route that lists all users of localhost mysql on the screen. The connection works fine but when I enter directions it returns a blank screen with "[]" (empty list)

The console and html page do not show any errors

But when I only change the route of "list_all" without the "api" part, everything goes fine. like this:

app.get('/list_all', (req, res) => {
    get_info(`SELECT * FROM users;`, function(result){
        res.json(result);
    });
});

It returns me the SQL response.

The question is: Why doesn't it work when I provide "api" on the route?

Function "get_info":

function get_info(sql_data, callback){

    con.getConnection((error, conn) => {
        if (error) { throw error; }
        conn.query(
            sql_data,
            (error, resultado) => {
                conn.release();
                if (error) { throw error; }
                return callback(resultado)
            }
        )
    })
}

I hope that route "api/list_all" can return SQL results for all users normally.