Creating "variable" for input query

I am trying to figure out if it would be possible to create a variable in my PowerBI query to replace a portion of my query.

What I'm ultimately trying to do, is to have a popdown menu in my PowerBI report that allows me to select the tenant name which associates with a particular tenantID.

I created a new table that contains "Tenant Name" and "TenantID fields" and added a slicer to select the Tenant. 

What I'd like to do next is if "Tenant Name X" is selected on the slicer, have the TenantID fetched from that table and replaced in my query so that the correct data can be pulled.

Now sure if that's possible like it would in SQL but am hoping that something similar can be setup.

= let Source = Json.Document(Web.Contents("https://api.loganalytics.io/v1/workspaces/TENANTID/query",
[Query=[#"query"="WaaSDeploymentStatus",#"x-ms-app"="OmsAnalyticsPBI",#"timespan"="all",#"prefer"="ai.response-thinning=true"],Timeout=#duration(0,0,4,0)])),
TypeMap = #table(
{ "AnalyticsTypes", "Type" },
{
{ "string", Text.Type },
{ "int", Int32.Type },
{ "long", Int64.Type },
{ "real", Double.Type },
{ "timespan", Duration.Type },
{ "datetime", DateTimeZone.Type },
{ "bool", Logical.Type },
{ "guid", Text.Type }
}),
DataTable = Source[tables]{0},
Columns = Table.FromRecords(DataTable[columns]),
ColumnsWithType = Table.Join(Columns, {"type"}, TypeMap , {"AnalyticsTypes"}),
Rows = Table.FromRows(DataTable[rows], Columns[name]),
Table = Table.TransformColumnTypes(Rows, Table.ToList(ColumnsWithType, (c) => { c{0}, c{3}}))
in
Table