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How to add multiple logins to a role

Sometimes I'm in a position where I have to restore a production database to a development server, but there are a whole bunch of logins (belonging to developers) that don't exist in production which do on the development instance that need adding to a role so they can perform DML.

A way to get around this is to create a separate database and table on the development server which has a list of the logins and the roles they need to be added to and add a piece of TSQL similar to that below to the database restore job which adds the logins to the correct role: 

--------------------------------
-- Create the database
--------------------------------
CREATE DATABASE UserManagement CONTAINMENT = NONE ON PRIMARY (
       NAME = N'UserManagement'
       ,FILENAME = N'C:\Program Files\Microsoft SQL Server\MSSQL11.MSSQLSERVER\MSSQL\DATA\UserManagement.mdf'
       ,SIZE = 5120 KB
       ,FILEGROWTH = 1024 KB
       ) LOG ON (
       NAME = N'UserManagement_log'
       ,FILENAME = N'C:\Program Files\Microsoft SQL Server\MSSQL11.MSSQLSERVER\MSSQL\DATA\UserManagement_log.ldf'
       ,SIZE = 1024 KB
       ,FILEGROWTH = 10 %
       )
GO
--------------------------------`
-- Create database to hold the usernames we will give permissions to
--------------------------------
USE UserManagement;
GO

CREATE TABLE LoginsToAdd (
       UserName VARCHAR(50)
       ,RoleName VARCHAR(50)
       ,DBName VARCHAR(20)
       )
--------------------------
-- Add the user accounts and the roles they need to the databases.
-- NB The logins need to exist already
--------------------------
USE UserManagement;
GO

INSERT LoginsToAdd(UserName, RoleName, DBName)
SELECT 'LSMith','db_datareader','DB1'
UNION ALL
SELECT 'JJones','db_datareader','DB1'
UNION ALL
SELECT 'FPatel','db_datareader','DB1'
UNION ALL
SELECT 'SDeSouza','db_datareader','DB1'
UNION ALL
SELECT 'PHewson','db_datareader','DB1'
UNION ALL
SELECT 'SBaldry','db_datareader','DB1'
UNION ALL
SELECT 'KCarrington','db_datareader','DB1'
--------------------------------
-- Create logins using a cursor
--------------------------------
PRINT 'Updating users/logins for DB1 database'

DECLARE @UserCommand VARCHAR(512)
       ,@UserName VARCHAR(255)
       ,@RoleName VARCHAR(255)

DECLARE UserCursor CURSOR
FOR
SELECT UserName
       ,RoleName
FROM LoginsToAdd
WHERE DBName = 'DB1'

OPEN UserCursor

FETCH UserCursor
INTO @UserName
       ,@RoleName

WHILE 0 = @@fetch_status
BEGIN
       PRINT '--> Adding user ' + @UserName + ' to role ' + @RoleName

       SET @UserCommand = 'USE [DB1];
IF  EXISTS (SELECT * FROM sys.database_principals WHERE name = N''' + @UserName + ''')
DROP USER [' + @UserName + '];
                          
CREATE USER [' + @UserName + '] FOR LOGIN [' + @UserName + '];

ALTER USER [' + @UserName + '] WITH DEFAULT_SCHEMA=[dbo];

EXEC sp_addrolemember N''' + @RoleName + ''', N''' + @UserName + ''';'

       EXECUTE (@UserCommand)

       FETCH UserCursor
       INTO @UserName
              ,@RoleName
END

CLOSE UserCursor

DEALLOCATE UserCursor

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