Login with admin access and create the user account.
1> CREATE LOGIN user_name WITH PASSWORD = 'password'
2> GO
Switch to the database.
1> USE database_name
2> GO
Changed database context to 'database_name'.
Add the user to the database.
1> CREATE USER user_name FOR LOGIN user_name
2> GO
Give the user readonly permissions.
1> EXEC sp_addrolemember 'db_datareader', 'user_name'
2> GO
https://dba.stackexchange.com/questions/170762/sqlcmd-new-login-user https://stackoverflow.com/questions/6688880/how-do-i-grant-read-access-for-a-user-to-a-database-in-sql-server