Creating App in AGOL and accessing it through Portal (Utilizing AGOL Login Credentials)

[DevlinHutchins]

I have done this before but cannot remember how I accomplished it. I am trying to create an item in Portal of a AGOL application. Our portal users then need to access the AGOL app. I remember I created an item and then entered in a AGOL credential to be utilized by the Portal users automatically. I can not remember how I exactly did it a year ago. I really appreciate any guidance and assistance. Thanks! 

[JonEmch]

You should be able to add the app via URL to Portal, then enter the credentials when the prompt comes up (ensuring that you select "save credentials")