Public (No login) requests
Capital words (GW, TID, EID, LID) should be replaced before the query. All of these values should be numeric.
Overall league id (LID) is 314 for 2020/2021 season.
Private (with login) requests
TID value should be your own team ID.
FPL API Endpoints Cheat Sheet by sertalpbilal
All API endpoints from Fantasy Premier League website