We typically recommend that you create a read-only trevor database user that Trevor can connect as.  You can do this easily by running the below commands against your SQL Server database:

-- STEP 1. Create user
CREATE LOGIN trevor WITH PASSWORD = 'secure_password';
CREATE USER trevor FOR LOGIN trevor

-- STEP 2. Grant select permissions
USE database_name_you_want_to_connect_to_trevor;
GRANT SELECT TO trevor;