Hi @Patrykqc,
Thank you for reaching out to the Community!
I’d like to share this article for information: “Working with OAuth”.
I also wanted to invite a couple of subject matter experts to this conversation: Hi @louischausse, @miljkovicmisa and @Teun do you have suggestions to help @Patrykqc, please?
Also, if anybody else has anything to add and/or share, please feel free to join in the conversation 
Thank you very much 
for your help and have a lovely day!
Best,
Bérangère