Revert the cookiePath to include the handler suffix

Signed-off-by: Marcus Eide <eide@spotify.com>

plugins/auth-backend/src/lib/oauth/OAuthAdapter.test.ts

@@ -383,7 +383,7 @@ describe('OAuthAdapter', () => {
       expect.any(String),
       expect.objectContaining({
         domain: 'domain.org',
-        path: '/auth/test-provider',
+        path: '/auth/test-provider/handler',
         secure: false,
       }),
     );
@@ -423,7 +423,7 @@ describe('OAuthAdapter', () => {
       expect.any(String),
       expect.objectContaining({
         domain: 'authdomain.org',
-        path: '/auth/test-provider',
+        path: '/auth/test-provider/handler',
         secure: true,
       }),
     );

plugins/auth-backend/src/lib/oauth/OAuthAdapter.ts

@@ -270,7 +270,7 @@ export class OAuthAdapter implements AuthProviderRouteHandlers {
       secure: this.options.secure,
       sameSite: 'lax',
       domain: this.options.cookieDomain,
-      path: this.options.cookiePath,
+      path: `${this.options.cookiePath}/handler`,
       httpOnly: true,
     });
   };
@@ -281,7 +281,7 @@ export class OAuthAdapter implements AuthProviderRouteHandlers {
       secure: this.options.secure,
       sameSite: 'lax',
       domain: this.options.cookieDomain,
-      path: this.options.cookiePath,
+      path: `${this.options.cookiePath}/handler`,
       httpOnly: true,
     });
   };