dial tcp :0: connect: connection refused

[hafung]

DNS: xx:xxx@tcp(localhost:3305)/play?charset=utf8mb4&parseTime=true&loc=Local

the username and password are all correct

then got this error "dial tcp :0: connect: connection refused" i switch to the cloud db server, the result is the same

[hafung]

i use wsl2 as develop env

but i dont think it's a network problem, PING is ok

[methane]

Isn't it 3306?

Note that this library is very widely used. It is your environment problem in 99.999%.
We can not investigate your environment. Investigate it by yourself. And if you find library issue, please report it.