Embed power bi report to angular js website queries

[Anonymous]

Dear All we have to embed our reports from report server to webiste (angular js) Below are the query that i  have can you please support 

1.Do we need to append username and password in the powerbi report server url for authentication all the time or is third part authentication is possible in power bi report server.

2.If third party authentication is possible can use common authentication for angular ,power bi and rest api.

3.If appending username and pwd in url is mandatory do we need to append it for first powerbi  url that is embedded in ui so that it will maintain a session  or do we need to append credentials to all urls.

4.Are there any other ways to embed power bi reports in UI other than iframes.

5.Are there any apis provided by powerbi report server that can help with embedding reports in UI .(like apis that are available for power bi services )