[Feature Request] Add Type of User.

[JAyres88]

Since in slq dbms we have grant options to comply with security privileges and access, I propose to replicate this to the tool, not extensively as sql dbms but perhaps textually, therefore creating two or three types of user so we can work in a more relaxed way when just exploring or troubleshooting stuff without the fear of altering data by accident.

Consumer - grant select
Data User - grant update and insert
Admin User- grant all