Allow users to update account settings

[SpoopyTim]

Developer Issue

Allow username, api key (regen), password, email, avatar (change from making the avatar the bot's icon) to be changed.

[SpoopyTim]

Make sure to move images to a cdn to prevent stupidly large images from slowing down requests, or just put restraints on submitted content (<- If doing that then also make sure the restraints are handled right at the backend and not just on the frontend to prevent people from forging request data since the endpoint will be open and not done in the background)