You can use solidDB® teletype tools, and many ODBC compliant SQL tools to modify user privileges. Users and roles are created and deleted using SQL statements or commands. A file consisting of several SQL statements is called an SQL script.
In the samples/sql directory, you will find the SQL script sample.sql, which gives an example of creating users and roles. You can run it by using solsql. To create your own users and roles, you can make your own script describing your user environment.