Change welcome email

Hello, I need to change the ‘welcome” email that new signups receive. It currently states:

Username: sdalyxxxx

To set your password, visit the following address:

[private link redacted]

We are migrating from another system so people are already members so I just need to send them an email with a more appropriate explanation.

Any help would be appreciated

Thanks,
Sue

https://ww.wp.xz.cn/plugins/wp-job-manager/