Return value from separate fields

Hello,

I'm looking for a solution to get data from two CSV files that will be used for a one-off search.

I have the following data:

CSV 1

1. displayName=Full User's Name (e.g. "John Doe")
2. ManagerRACF= The Manager's User ID (e.g. Jdoe002)
3. sAMAccountName=User's User ID (e.g. Jdoe001)

CSV 2

1. First_Name
2. Last_Name
3. Token_Nr

What I want to do is get combine CSV2 with CSV1 (easy) and then find the person's manager's full name with nothing more than the ManagerRACF field (unknown).

For the first part:

source=CSV1.csv
|join displayName[search index="main" source="CSV2.csv" | eval displayName=First_Name." ".Last_Name |dedup displayName| fields + displayName]
| table displayName, ManagerRACF, ManagerName, Token_Nr

This will join the two files and show the user's full name, the Manager's UserID and the user's Token number.

Now how do i get ManagerName to translate into the full name of the person's manager from CSV 1 based on the data in the ManagerRACF column? Basically what this means is, I need to find data in ManagerRACF (Jdoe002) search the sAMAccountName column for that value, and then return the results from displayName on that row into the ManagerName column.

Thanks!

Ken