Generated unique username not applied during account creation

[Iron-56]

Changes:

Fixed an issue where username conflict occurs from a manual signup and then a github account signup using same username. Destructuring profile to get username does not create a reference to the profile object property so we must manually assign the value.

I have verified that this pull request:

• has no linting errors (npm run lint)
• has no test errors (npm run test)
• has no typecheck errors (npm run typecheck)
• is from a uniquely-named feature branch and is up to date with the develop branch.
• is descriptively named and links to an issue number, i.e. Fixes #123
• meets the standards outlined in the accessibility guidelines

[Iron-56]

@raclim I have verified and a different username is generated and the my sketch section shows different content. Earlier the server thinks as if it were same accounts.

[Iron-56]

@raclim could you review when you're free?