List of MLS club post-season droughts

Columns: Club | Last Champions League Qualification | Method of Qualification | Length of drought
FC Cincinnati | never ( club entered MLS in 2019 ) | 1 season | Houston Dynamo | 2019 | 2018 U.S. Open Cup | 1 season | New York Red Bulls | 2019 | aggregate record in 2017 and 2018 runners-up | 1 season | Sporting Kansas City | 2019 | 2017 U.S. Open Cup | 1 season | Toronto FC | 2019 | 2018 Canadian Championship | 1 season | Atlanta United FC | 2020 | 2019 U.S. Open Cup | 0 seasons

Example questions:
What is the Champions League of the CONCACAF Champions League club whose stadium has a capacity of 20,000 ? | What is the Method of Qualification of the CONCACAF Champions League club that plays its home games at Rio Tinto Stadium ? | What is the CONCACAF Champions League club of the Champions League sponsored by Scotiabank ? | What is the length of drought of the CONCACAF Champions League club in which Gerard Nijkamp is general manager ? | What is the length of drought of the CONCACAF Champions League club whose current head coach is Matías Almeyda ?

Answers:
2015-16 | 2014 Supporters ' Shield | Atlanta United FC | 1 season | 6 seasons