refactor: rewrite oauth setup for the new api

src/api/v1/setup.service.ts

@@ -1,6 +1,6 @@
 import {Injectable} from "@angular/core";
 import ApiService, {AvailableVersion} from "@api/api.service";
-import {catchError, of, switchMap} from "rxjs";
+import {catchError, of} from "rxjs";
 import {DatabaseResponse} from "@api/v1/configuration/databaseResponse";
 import {DatabaseRequest} from "@api/v1/configuration/databaseRequest";
 import {CacheRequest} from "@api/v1/configuration/cacheRequest";
@@ -137,18 +137,21 @@ export default class SetupService extends ApiService {
 
   public adminConfiguration() {
     let request = this.createRequestBuilder()
-      .setEndpoint('UpdateAdminConfiguration')
+      .setEndpoint('AdminConfiguration')
       .setWithCredentials()
       .build;
 
-    return this.get(request).pipe(switchMap(_ => {
-      request = this.createRequestBuilder()
-        .setEndpoint('AdminConfiguration')
-        .setWithCredentials()
-        .build;
+    return this.get<UserResponse>(request);
+  }
 
-      return this.get<UserResponse>(request);
-    }));
+  public registerOAuth(token: string) {
+    let request = this.createRequestBuilder()
+      .setEndpoint('HandleToken')
+      .setQueryParams({token: token})
+      .setWithCredentials()
+      .build;
+
+    return this.get<null>(request);
   }
 
   public setLogging(data: LoggingRequest | null = null) {