sql connection error failed

can't connect to database  user login failed vmboojtwin1206\administrator
how do I fix this in the database I created it work but when I would link a database that I restored I have a login error ? how to add SQL user on database

data source = vmboojtwin1206;initialcatalog= a;integrated security =true; user id = ? (user_admin) ; password = (User password)
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Brian CroweDatabase AdministratorCommented:
--Create the login at the server level using SQL authentication
CREATE LOGIN <username> WITH PASSWORD = '<password>';


--Create the login at the server level with Windows authentication
CREATE LOGIN [<domainName>\<loginName>] FROM WINDOWS;

--Create the database user
USE <databasename>;
CREATE USER <username> FOR LOGIN <username>
   WITH DEFAULT_SCHEMA = <schemaname>;

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft SQL Server

From novice to tech pro — start learning today.