Use unauthorized helper function in each API route, remote unused 'center' constant

src/pages/api/check.ts

@@ -1,22 +1,15 @@
-import type {NextApiRequest, NextApiResponse} from 'next';
-import {env} from '@/env/server.mjs';
+import type { NextApiRequest, NextApiResponse } from 'next';
+import { unauthorized } from '@/utils/helpers';
 
 type StatusData = { status: ResponseStatus };
 
-type ResponseStatus =
-    | 'unauthorized'
-    | 'success';
-
+type ResponseStatus = 'unauthorized' | 'success';
 
 export default async function handler(
-    req: NextApiRequest,
-    res: NextApiResponse<StatusData>
+	req: NextApiRequest,
+	res: NextApiResponse<StatusData>
 ) {
-    if (req.query.key != env.API_KEY) {
-        // auth failed
-        res.status(401).json({ status: 'unauthorized' });
-        return;
-    }
+	if (unauthorized(req, res)) return;
 
-    res.status(200).json({ status: 'success'});
+	res.status(200).json({ status: 'success' });
 }

src/pages/api/config.ts

@@ -1,7 +1,7 @@
 import type { NextApiRequest, NextApiResponse } from 'next';
-import { env } from '@/env/server.mjs';
 import { fetchConfiguration, setConfiguration } from '@/db';
 import { Configuration, ConfigurationSchema } from '@/timing';
+import { unauthorized } from '@/utils/helpers';
 
 type StatusData = { status: ResponseStatus };
 
@@ -11,11 +11,7 @@ export default async function handler(
 	req: NextApiRequest,
 	res: NextApiResponse<StatusData | Configuration>
 ) {
-	if (req.query.key != env.API_KEY) {
-		// auth failed
-		res.status(401).json({ status: 'unauthorized' });
-		return;
-	}
+	if (unauthorized(req, res)) return;
 
 	if (req.method == 'GET') {
 		try {

src/pages/api/cron.ts

@@ -1,7 +1,6 @@
 import { getMatchingTime } from '@/timing';
 import type { NextApiRequest, NextApiResponse } from 'next';
 import { getDistance } from '@/location';
-import { env } from '@/env/server.mjs';
 import monitorAsync from '@/monitor';
 import { sendNotification } from '@/notify';
 import {
@@ -32,11 +31,6 @@ type ResponseStatus =
 	| 'notified'
 	| 'error';
 
-const center = {
-	latitude: env.CENTER_LATITUDE,
-	longitude: env.CENTER_LONGITUDE
-};
-
 export default async function handler(
 	req: NextApiRequest,
 	res: NextApiResponse<(ResponseData & StatusData) | StatusData>