Fix exception when handling login failure
Fix exception when handling login failure

Logging in with an invalid token would throw a TypeError due to improper
passing of arguments to HTTPClient._token.  Fix by properly passing the
keyword only bot argument.

khazhyk/discord.py,imayhaveborkedit/discord.py,Harmon758/discord.py,variablehair/Eggplantato,lgkern/PriestPy,rapptz/discord.py,Harmon758/discord.py,Rapptz/discord.py,mgardne8/discord.py