Subgraph template name

[razgraf]

In the default subgraph template (specifically subgraph.yaml) the repository is pointing to sablierhq/sablier-subgraph. This will cause all instances of CEA to declare that as the project repo (e.g. EPNS).

You may want to change that to either an empty string (so the developer is notified of this required field) or request it with a parameter when deploying the template.

Another quick thing would be to help users who run into No Access Token by suggesting the usage of the --access-token XYZ when doing yarn deploy.

[PaulRBerg]

Thanks for the report, dude!