Dynamics 365 - Get Value knowing the index for Multi Select Option

Hi All,

I have retrieved the index from a a multi select option field using the .getText

Knowing this index what is the easiest way to map this index to get the value from this

example:

Index       User          Value
0              User 1      100000001
1              User 2      100000002
2              User 3      100000003

Value index is in a var indexValue = Index
Where index = 1

How  can I get the User 2 Value knowing their Index.

Thanks for your help