Double check that you are using the correct syntax. Help is in the FAQ here:
Note that Galaxy Main https://usegalaxy.org is very busy right now and if you get a might counter like this when once connected
[Delaying before reconnect: 33]. Allow this to run until the data transfers. It may countdown a few times (loop).
If you are still having problems with the basic connection after comparing your command to the FAQ, please share the command you are using (with generic, not actual, email/password).
Thanks! Jen, Galaxy team