To find your correct bot token for logging in with your bot:
Click on your bot
Go to the "Bot" tab
Click "Reset Token" (if anyone is using your bot, this will make their version of the bot break / their bot token become invalid).
Save the code it gives you (you'll never be able to see it again). When I just tested it, it gave me a long 72 character code.
There are several other keys in the applications page that look like the bot token but are not it.
Do not use:
General Information > Application ID
General Information > Public Key
OAuth2 > Client ID
OAuth2 > Client Secret
You must use only: