How to make the block wait the execution of a method to continue

Question

I have a route check login, it calls a method that returns a Boolean, I need to make an if with the value returned, but it returns Undefined, as it has not yet been executed.

app.post('/home', urlencodeParser, (req, res) => {
    var resLogin = cruds.verificaLogin(req.body.username, req.body.password)
    console.log(resLogin)
    res.send('<h1>Olá Mundo</h1>')    
})

Method verificaLogin:

verificaLogin(_email, _senha) {
    var res = new Boolean(0)       
    this.sql.query(`SELECT COUNT(*) login [login] FROM users where email = ${_email} and senha = ${_senha}`, function(erro, results, fields){            
        //if (!erro)                
        console.log(res)    
        return res    
    })   
}