Hi @rizasoylu06, could you share a little more information about what you're trying to do? Why do you need the authentication url information? Are you building a Zapier integration? Sending a webhook? And what app/s are you trying to connect?
From what you wrote it sounds like you found a solution by using API key authentication - is that right? Do you still need a hand with this or are you all set?
@rizasoylu06 Just wanted to check in to see if you saw the last reply from Danvers and if that was helpful or if you needed more assistance here. Let us know!