use master
CREATE LOGIN dms_user WITH PASSWORD = 'dms_user', CHECK_POLICY = OFF, DEFAULT_DATABASE = dms_sample; /* pragma: allowlist secret */
GO
EXEC master..sp_addsrvrolemember @loginame = N'dms_user', @rolename = N'sysadmin'
GO

Use dms_sample;
GO

IF NOT EXISTS (SELECT * FROM sys.database_principals WHERE name = N'dms_user')
BEGIN
    CREATE USER [dms_user] FOR LOGIN [dms_user]
        use dms_sample
    EXEC sp_addrolemember N'db_owner', N'dms_user'
END;
GO