fix(auth): use fetch instead of axios when fetching refresh token due to edge runtime compatibility

server/utils/auth.ts

@@ -1,4 +1,3 @@
-import axios from 'axios'
 import { JWT } from 'next-auth/jwt'
 import { jwtDecode } from 'jwt-decode'
 
@@ -7,17 +6,28 @@ import { KeycloakJwtPayload } from '../types'
 
 export async function refreshToken(token: JWT): Promise<JWT> {
   try {
-    const { data: newToken } = await axios.post(
+    const response = await fetch(
       `${env.KEYCLOAK_URL}/realms/${env.KEYCLOAK_REALM_NAME}/protocol/openid-connect/token`,
-      new URLSearchParams({
-        client_id: env.KEYCLOAK_CLIENT_ID,
-        client_secret: env.KEYCLOAK_CLIENT_SECRET,
-        grant_type: 'refresh_token',
-        refresh_token: token.refreshToken as string,
-      }),
-      { headers: { 'Content-Type': 'application/x-www-form-urlencoded' } }
+      {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/x-www-form-urlencoded',
+        },
+        body: new URLSearchParams({
+          client_id: env.KEYCLOAK_CLIENT_ID,
+          client_secret: env.KEYCLOAK_CLIENT_SECRET,
+          grant_type: 'refresh_token',
+          refresh_token: token.refreshToken as string,
+        }).toString(),
+      }
     )
 
+    if (!response.ok) {
+      throw new Error(`Error: ${response.statusText}`)
+    }
+
+    const newToken = await response.json()
+
     const jwtPayload: KeycloakJwtPayload = jwtDecode(newToken.access_token)
 
     return {