Provide a way to query current user roles

[rickmak]

Unable to get currentUser's roles when I logged in as non-Admin user. Would please advise?

• Skygear Server Date/Version: v0.14.0
• Application Platform: skygeario.com deployment.
• Is this a regression?
• Attached logs, screenshots

Expected Results

Current user can query his own roles by using user:query.

Actual Results

After I logged in as an Admin user, I can:
• run getUsersByEmail on currentUser's email
• run getUsersByEmail on other users' emails
=> It suits my needs when I logged in as Admin.

But after I logged in as an non-Admin user, I cannot:
• run getUsersByEmail on currentUser's email
• run getUsersByEmail on other users' emails
The response says:
{"error":{"name":"PermissionDenied","code":102,"message":"No permission to query user"}} with 403 status code.

Proposed solution

Instead of introducing complex access control to user:query. I would suggest provide an interface me that will return the current user auth data n and user record. It can be also act as an endpoint that validate the current access token validity before making others API call. In SDK, provided respective API.

For JS, I propose:

skygear.whoami()

Also auth:login will provided the user roles as in me too.

[ben181231]

Tasks

• Add user:me endpoint and include roles in the response
• Add roles to auth (login / signup) response
• Add supports on iOS SDK
• Add supports on Android SDK
• Add supports on Javascript SDK
• Update documentation