Why am I getting a token In unexpected error? on the last line of my query in PowerQuery

[Anonymous]

let
    Source = Odbc.Query("driver={Amazon Redshift (x64)};server=awspbi-sam-adhoc.db.amazon.com;database=awspbi;port=8192;dsn=Amazon Redshift ODBC DSN"
,"

with LambdaTieredCustDesc As (
    select region, cust_desc, month_begin_date, primary_usage_type, SUM(usage_amount) as usage from ec2_bi.rpt_aws_monthly_est_revenue
        WHERE
    wbr_name        ='Lambda'
        and is_fraud_flag   = 'N'
        and is_internal_flag = 'N'
        AND cust_desc NOT LIKE '%[%]%'
        and primary_usage_type in  ('Lambda-GB-Second','Lambda-GB-Second-ARM')
        and month_begin_date = '2023-04-01' 
        group by region, cust_desc, month_begin_date, primary_usage_type having usage > 6000000000
)
select month_begin_date, cust_desc, region, primary_usage_type, sum(usage_amount) as usage
    from ec2_bi.rpt_aws_monthly_est_revenue
        where   wbr_name        ='Lambda'
        and is_fraud_flag   = 'N'
        and is_internal_flag = 'N'
        and primary_usage_type in  ('Lambda-GB-Second','Lambda-GB-Second-ARM','Request','Request-ARM')
        and month_begin_date >= '2023-04-01' 
        and cust_desc in (SELECT DISTINCT cust_desc from LambdaTieredCustDesc)
    group by 1,2,3,4,5
"),

Why am I getting a token In unexpected error? on the last line of my query in PowerQuery. I always get these similar errors and cannot resolve

[watkinnc]

Remove the final comma and then type

in Source

--Nate