How can I create a SQL user in a SQL Server Express database that I added to my project?
I need to create a user to use in a connection string that doesn't use Integrated Security.
You would need to create a SQL Authenticated login first with CREATE LOGIN then add a user associated with that login to your database by using CREATE USER.
USE [master]
GO
CREATE LOGIN [JohnEgbert] WITH PASSWORD=N'YourPassword',
DEFAULT_DATABASE=[YourDB], CHECK_EXPIRATION=OFF, CHECK_POLICY=OFF
GO
USE [YourDB]
GO
CREATE USER [JohnEgbert] FOR LOGIN [JohnEgbert] WITH DEFAULT_SCHEMA=[dbo]
GO