UpsertUser send invalid request when no bucket specified

The current code always appends brackets [] regardless of whether the role you want to add requires them or not. For example using the Role.

 
user := gocb.User{ Username: username, DisplayName: usernameConfig.DisplayName, Password: password, Roles: []gocb.Role{

{ Name: "ro_admin", }

, }, }
produces this error from the couchbase server...

couchbase_test.go:140: err: {"errors":{"roles":"Cannot assign roles to user because the following roles are unknown, malformed or role parameters are undefined: [ro_admin[]]"}} |

{"unique_id":"157521e8-de25-4a23-b76b-fb7164a6b006","endpoint":"[http://localhost:8091"}

|http://localhost:8091%22%7D]

 

https://github.com/couchbase/gocb/pull/66