Allow to pass lazy GraphQL endpoint url to graphiql plugin

Signed-off-by: Dmitriy Lazarev <w@kich.dev>

.changeset/twelve-vans-sell.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-graphiql': patch
+---
+
+Allow to pass lazy GraphQL endpoint URL

plugins/graphiql/api-report.md

@@ -16,7 +16,7 @@ import { RouteRef } from '@backstage/core-plugin-api';
 export type EndpointConfig = {
   id: string;
   title: string;
-  url: string;
+  url: string | Promise<string>;
   method?: 'POST';
   headers?: {
     [name in string]: string;

plugins/graphiql/src/lib/api/GraphQLEndpoints.ts

@@ -26,7 +26,7 @@ export type EndpointConfig = {
   id: string;
   title: string;
   // Endpoint URL
-  url: string;
+  url: string | Promise<string>;
   // only supports POST right now
   method?: 'POST';
   // Defaults to setting Content-Type to application/json
@@ -66,7 +66,7 @@ export class GraphQLEndpoints implements GraphQLBrowseApi {
           ...config.headers,
           ...options.headers,
         };
-        const res = await fetch(url, {
+        const res = await fetch(await url, {
           method,
           headers,
           body,