Missing information about defining permissions

[marktani]

There is no information in the docs about narrowing down a permission to specific fields.

[marktani]

Also see https://github.com/graphcool/graphcool/pull/783 🙂

[nikolasburk]

I added field permissions to the example in graphcool.yml as well an example in the Authorization chapter itself:

• https://github.com/graphcool/graphcool/blob/master/docs/04-Reference/01-Service-Definition/02-graphcool.yml.md#examples-2
• https://github.com/graphcool/graphcool/blob/master/docs/04-Reference/06-Auth/03-Authorization/01-Overview.md#specifying-permissions-in-graphcoolyml