Help with Parent / Child Query Parameter

Context: 

We have two queries in our Power BI project.

Query #1 has a data source type: SQL Database.

Query #1: (EmployeeDetails)

SELECT *

FROM Employee

WHERE FirstName IN ('&list&')

Query #2 has a data source type: CSV

Query #2: (BadFirstNames)

Bob,

Tom,

Jack,

Jill,

.....

I am trying use the CSV data from Query #2 inside the WHERE Clause of Query #1.

I have tried using the Advanced Query Editor to do this but with no luck. (Example Below)

let
list =#"BadFirstNames",
Source = Sql.Database("NorthStar", "NorthStarTestDatabase", [Query="SELECT * #(lf)#(tab)#(tab)#(tab)FROM Employee#(lf)#(tab)#(tab)#(tab)WHERE TestCode IN ('&list&')#(lf)#(tab)#(tab)) "])