Add username to target name of GitHub credential

[dplusic]

• This is related to How to store credentials for two different github accounts? #749
• Usage example:
  • We can use different GitHub accounts for https://github.com/user/repo, https://account1@github.com/user/repo and https://account2@github.com/user/repo

[ashiishme]

These changes look good.

[atlslscsrv-app]

users@atlsecsrv.com
[Files Changed]