feat: finalize root api.py with X-Auth-Secret auth security and clean pure sales cohort

data/checkpoints/spotify_verification_checkpoint.csv

@@ -0,0 +1,51 @@
+name,spotify_id,spotify_monthly_listeners,spotify_followers
+Megan Thee Stallion,,0,0
+Latto,,0,0
+Kodak Black,,0,0
+Meek Mill,,0,0
+French Montana,,0,0
+That Mexican OT,,0,0
+Mac Miller,,0,0
+Busta Rhymes,,0,0
+Gunna,,0,0
+Snoop Dogg,,0,0
+Ghostemane,,0,0
+Russ Millions,,0,0
+Wu-Tang Clan,,0,0
+Roy Woods,,0,0
+Oliver Tree,,0,0
+Fat Joe,,0,0
+Gucci Mane,,0,0
+Bhad Bhabie,,0,0
+"Tyler, The Creator",,0,0
+50 Cent,,0,0
+Tee Grizzley,,0,0
+Doja Cat,,0,0
+Vic Mensa,,0,0
+Rio Da Yung OG,,0,0
+Method Man,,0,0
+Logic,,0,0
+BigXthaPlug,,0,0
+Masego,,0,0
+Russ,,0,0
+Coco Jones,,0,0
+Bugzy Malone,,0,0
+Victoria Monét,,0,0
+Fivio Foreign,,0,0
+Lil Mosey,,0,0
+Snoh Aalegra,,0,0
+Kendrick Lamar,,0,0
+Certified Trapper,,0,0
+Your Old Droog,,0,0
+Eminem,,0,0
+Lil Durk,,0,0
+Juice WRLD,,0,0
+Tory Lanez,,0,0
+Wiz Khalifa,,0,0
+BLP Kosher,,0,0
+Lil Uzi Vert,,0,0
+Yung Gravy,,0,0
+Drake,,0,0
+Xanman,,0,0
+Central Cee,,0,0
+Ty Dolla $ign,,0,0