Hey I am new to golang and not about to connect to this port . Unable to use postman and mysql

[sagar-acharya24]

panic: dial tcp 127.0.0.1:9010: connectex: No connection could be made because the target machine actively refused it.

goroutine 1 [running]:
BookstoreManagement/config.Connect(...)
C:/Program Files/Go/src/BookstoreManagement/config/app.go:16
BookstoreManagement/models.init.0()
C:/Program Files/Go/src/BookstoreManagement/models/book.go:19 +0xe5
exit status 2