Undo making database optional

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

plugins/auth-backend/api-report.md

@@ -501,7 +501,7 @@ export interface RouterOptions {
   // (undocumented)
   config: Config;
   // (undocumented)
-  database?: PluginDatabaseManager;
+  database: PluginDatabaseManager;
   // (undocumented)
   discovery: PluginEndpointDiscovery;
   // (undocumented)

plugins/auth-backend/src/service/router.ts

@@ -38,7 +38,7 @@ type ProviderFactories = { [s: string]: AuthProviderFactory };
 
 export interface RouterOptions {
   logger: Logger;
-  database?: PluginDatabaseManager;
+  database: PluginDatabaseManager;
   config: Config;
   discovery: PluginEndpointDiscovery;
   providerFactories?: ProviderFactories;