As a Sentiance user you could have various access roles assigned to you which grant or restrict data access.
By default no data access is granted which means you only have access to your own data. Insights will show your own timeline and any GraphQL or REST queries for your own user will return data.
With the Spectator role granted to your user on your organisation's Account, you can view data for all users of all Applications which belong to that organisation's Account. This includes user data in dashboards such as Insights, and making GraphQL or REST queries.
With the Developer role granted to your user on your organisation's Account, you have all the same data access capabilities as Spectators, and can, additionally, perform developer-centric operations on all Applications belonging to that organisation's Account.
Currently, as a Developer, you can do the following things:
View the Secret Key of any Application under that Account. This is the Secret used in initialising the SDK.
Administrate Webhooks of any Application under that Account, for the Firehose to connect to. You can submit requests for a new Webhook or update/delete/enable/disable an existing Webhook.
Administrate API Keys of any Application under that Account. You can view or revoke all existing API Keys, or create new ones.