CREATE TABLE #Staging
( UserId CHAR(15),
	UserName VARCHAR(35),
	.
	.
	.
	)

BULK INSERT #Staging
FROM '\\Share\Folder\FileName.xls'
WITH(
	BATCHSIZE = 15000,
	CHECK_CONSTRAINTS,
	DATAFILETYPE = 'native',
	ROWS_PER_BATCH = 15000,
	,
	,
)

DECLARE @UserID CHAR(15), @UserName VARCHAR(35), ......
DECLARE Users CURSOR LOCAL FAST_FORWARD FOR
	SELECT UserId, UserName .....
	FROM #Staging
OPEN Users
FETCH NEXT FROM Users INTO @UserID, @UserName, .....
WHILE @@FETCH_STATUS = 0 BEGIN
	
	--Create login
	DECLARE @Login NVARCHAR(100) =
	'CREATE LOGIN '+@UserID+'
	FROM WINDOWS;'
	BEGIN TRY
		EXEC sp_executesql @Login
	END TRY
	BEGIN CATCH
		RAISERROR('There was an error creating login for user %s',16,1,@UserID)
	END CATCH
	
	--Grant Acccess to DB
	SELECT @Login = 'USE GivenDatabase
	CREATE USER '++@UserID+'
	FOR LOGIN '+@UserID
	BEGIN TRY
		EXEC sp_executesql @Login
	END TRY
	BEGIN CATCH
		RAISERROR('There was an error linking login for user %s to database GivenDatabase',16,1,@UserID)
	END CATCH
	
	FETCH NEXT FROM Users INTO @UserID, @UserName, .....
	
END
CLOSE Users
DEALLOCATE Users
DROP TABLE #Staging