EM7455 - AT!SCACT=1,1 command shows error with no network service

I am currently trying to configure an EE IoT SIM to EM7455.
The AT+CGDCONT? command gives the following response.

+CGDCONT: 1,"IPV4V6","apn.com","",0,0,0,0


I am using a custom APN with username and password, while configuring using CGDCONT command I provided only APN url, I am not sure where to provide username and password.

But for AT+SCACT=1,1 command it shows an error

+CME ERROR: no network service

You can see here for username amd password