Oh hold on a second. So confused. What is this additional parameter you wrote inside your authorization call of getConnectionName:
When I first looked at it I thought that piece as part of an execution: of a formula(), but now that its morning and my brains working Im realizing its totally different than what I thought.
Can you let me know whats going on with that?
Itās a helper function that sets the name of the account after itās been connected. More information here: Authentication - Coda Pack SDK
And so the saga continues: I updated my code to match yours, and still getting this:

Thats the same kind of errors I was getting before. . . Sorry to keep bothering you
Can you post a screenshot of the callback URL section of the Strava app config screen? Can you double-check you are using the right client ID and secret that corresponds to that app?
Yeah - Iāve double checked. And Iāve tried different scopes, and tried Leoās additionalParameter as well
@Eric_Koleda - So it continues
Iāve gotten the pack to finally bring me to a valid authorization page (as you saw) but now it just bumps me back to my Coda doc saying āfailed to connectā
GIF Showing live bump back and fail

Heres the two errors my pack tools are providing:
Heres the other one
That error seems to indicate that getConnectionName isnāt returning anything. Are you using the same code that I was? You can also just remove that function from your auth definition, and it will use your Coda user name as the connection name.
VICTORY
SYNC TABLE IS WORKING
I had to erase the getConnectionName parameter as you mentioned
Congrats 
It was a long fought battle, but I never gave up hope 
Now to polish and get the rest of it up. Canāt thank you enough!