Make it return JSON errors, to better represent on the website

[todo]

id/src/routes/api/application.js

Lines 39 to 43 in d20ac83

	* @todo Make it return JSON errors, to better represent on the website
	*/
	router.get('/application', async (req, res) => {
	if (req.cookies.discord_access_token && req.cookies.discord_refresh_token) {
	if (!req.query.client_id || !req.query.redirect_uri || !req.query.scope) return res.status(500).send('Bad Request')

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This issue was generated by todo based on a todo comment in d20ac83. It's been assigned to @metehus because they committed the code.