Add avatar_src to the Panoptes JWT

[eatyourgreens]

Can we add avatar_src to the encoded payload of our web tokens, so that the front-end doesn't have to make an API request to get the URL for the user avatar?

Related front-end PR: zooniverse/front-end-monorepo#4803

[eatyourgreens]

If it's as straightforward as adding avatar: user.avatar_src here, then I can open a PR.

panoptes/config/initializers/doorkeeper.rb

Lines 75 to 82 in 889e845

	{
	data: {
	id: user.id,
	login: user.login,
	dname: user.display_name,
	scope: opts[:scopes].to_a,
	admin: user.is_admin?
	},

[eatyourgreens]

I’m not sure about that previous comment, because avatar_src is added by the User serialiser.

[eatyourgreens]

This has come up while adding auth to the new Next.js app (zooniverse/front-end-monorepo#5459.) When we get a user from the Panoptes JWT, we don’t get the user avatar URL.

[mcbouslog]

This would also be helpful for the user stats and logged in homepage.