Issue - Handle data (attributes) with the same predicate

Currently, all pieces of data are stored with a predicate (eg: _schema:addressLocality_) that is unique.

However, we should allow for data with the same predicate to be stored on the phone, like in the case of credentials to login to the dashboard. For example, we might need to store credentials for multiple logins to the same community (eg: predicate _schema:iotCommunity_).