'sa' cannot access database in SSMS

I accidentally removed the user 'sa' from a SQL db so when I connect using SSMS with the user 'sa' I can no longer access this database, db1.  How do I add 'sa' back to db1?
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Vitor MontalvãoMSSQL Senior EngineerCommented:
'SA' login cannot be removed. How you did that?
szadrogaAuthor Commented:
I restored a db from a .bak file then right clicked on login and selected delete
szadrogaAuthor Commented:
against the 'sa' login
Vitor MontalvãoMSSQL Senior EngineerCommented:
You didn't delete the Login but a user database. You can always restore the database to recover the user.

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