credential error during `dl.create_sibling_github`?

[feilong]

My uploading process crashed during this dl.create_sibling_github command:
https://github.com/templateflow/python-manager/blob/master/tfmanager/cli.py#L260-L267

For some reason the traditional github_login option keeps causing credential error, and I need to change it to credential and use a token to fix it. I think it might be because the traditional ssh option is obsolete for github and/or datalad?

[oesteban]

@feilong you are right. We need to revise this, and we probably want to drop the ssh option.

I hit these issues when addressing #10

[feilong]

Makes sense to me.